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{{short description|2017 blockchain game on Ethereum}}
{{orphan|date=December 2017}}
{{Infobox video game
'''CryptoKitties''' is blockchain-based virtual game that allows players to adopt, raise, and trade virtual cats, and it represents one of the earliest attempts to deploy ] technology for recreational and leisurely pursposes.<ref> "The Leisures of Blockchains." Information Systems & Economics eJournal, Social Science Research Network (SSRN). Accessed 19 December 2017.</ref>
| collapsible =
| state =
| italic title =
| title = CryptoKitties
| image = CryptoKitties cover.jpg
| alt =
| caption =
| developer = Dapper Labs
| publisher = Dapper Labs
| series =
| engine =
| platforms = ]
| released = November 2017
| genre = ]
| modes =
}}'''''CryptoKitties''''' is a ] developed by Canadian studio Dapper Labs. The game allows players to buy, sell, and create ] (NFTs) using ]. These NFTs represent virtual cats.<ref name=proactive>{{cite web |last1=Miller |first1=John |title=Animoca Brands one of the ASX top performers in 2018 |url=http://www.proactiveinvestors.com.au/companies/news/190721/animoca-brands-one-of-the-asx-top-performers-in-2018-190721.html |website=Proactive Investors |access-date=7 October 2018 |date=29 Jan 2018}}</ref><ref name=":1" >{{Cite news|url=https://venturebeat.com/2018/10/06/cryptokitties-explained-why-players-have-bred-over-a-million-blockchain-felines/|last=Takahashi|first=Dean |title=CryptoKitties explained: Why players have bred over a million blockchain felines|date=6 October 2018|work=VentureBeat|language=en-US|access-date=2021-05-22}}</ref> The game's popularity in December 2017 congested the Ethereum network, causing it to reach an all-time high in the number of transactions and slowing it down significantly.<ref>{{cite news|url=https://www.bbc.com/news/technology-42237162
|title=CryptoKitties craze slows down transactions on Ethereum|date=2017-12-05|access-date=7 Oct 2018|df=dmy-all}}</ref>


Dapper Labs was spun-off from Axiom Zen.<ref>{{cite web |title=CryptoKitties creator Dapper Labs raises $15 million to build more blockchain cats |last=Takahashi|first=Dean|date=1 November 2018 |url=https://venturebeat.com/business/cryptokitties-creator-dapper-labs-raises-15-million-to-build-more-blockchain-cats/|work=VentureBeat}}</ref> Both companies are based in Vancouver, Canada.<ref>{{Cite Twitter profile|dapperlabs}}</ref><ref>{{Cite Twitter profile|axiomzenteam}}</ref> ''CryptoKitties'' is the first major game to use blockchains, and one of the earliest examples of a blockchain project designed for recreation.<ref name=proactive/>
Whereas CryptoKitties is not a ], it does offer something similar to one: each CryptoKitty is one-of-a-kind, 100% owned by the user, validated through the Blockchain, and the value can appreciate or depreciate based on the market. Cryptokitties cannot be replicated, taken away, or destroyed. The game involves digital cats, and users who buy, sell, and sire (breed) them. CryptoKitties operates on ]’s underlying blockchain network. A test version of CryptoKitties was unveiled at ETH Waterloo on October 19 2017, the largest Ethereum hackathon in the world.


==Gameplay==
As of December 2, the high selling cat was sold for 246.9255 ] (~$117,712 USD) on that day.
Players purchase, breed and trade virtual cats that have different visual features of varying levels of rarity. Players must purchase ] cryptocurrency to join the game, and spend it to perform each breeding and trade action within the game.<ref name="mashable">{{cite news |last1=Schroeder |first1=Stan |title=How to play CryptoKitties, the insanely popular crypto game |url=https://mashable.com/article/how-to-play-cryptokitties |access-date=17 November 2021 |work=Mashable |date=4 December 2017 |language=en}}</ref>


The virtual cats are breedable and carry a 256 bit distinct genome with unique DNA and different attributes that can be passed to offspring.<ref name=":0">{{Cite news|url=https://www.cnbc.com/2017/12/06/meet-cryptokitties-the-new-digital-beanie-babies-selling-for-100k.html|title=Meet CryptoKitties, the $100,000 digital beanie babies epitomizing the cryptocurrency mania|last=Cheng|first=Evelyn|date=2017-12-06|work=CNBC|access-date=2017-12-10}}</ref> Several traits can be passed down including cool down time (how much time is required before a cat can breed), whiskers, fur color and background color.<ref>{{Cite news|url=https://techcrunch.com/2017/12/03/people-have-spent-over-1m-buying-virtual-cats-on-the-ethereum-blockchain/|title=People have spent over $1M buying virtual cats on the Ethereum blockchain|last=Tepper|first=Fitz|work=TechCrunch|access-date=2017-12-10|language=en}}</ref> The virtual cats are breedable and carry a unique number and 256-bit distinct genome with ] and different attributes (known as "{{not a typo|cattributes}}") that can be passed to offspring.<ref name=":0">{{cite news|url=https://www.cnbc.com/2017/12/06/meet-cryptokitties-the-new-digital-beanie-babies-selling-for-100k.html|title=Meet CryptoKitties, the $100,000 digital beanie babies epitomizing the cryptocurrency mania|last=Cheng|first=Evelyn|date=2017-12-06|work=CNBC|access-date=2017-12-10}}</ref> Several traits can be passed down from the parents to the offspring. There are a total of 12 {{not a typo|cattributes}} for any cat, including pattern, mouth shape, fur, eye shape, base color, accent color, highlight color, eye color, and optional wild, environment, 'purrstige' and 'secret'. Other features like cool downtimes are not passed down, but are instead a function of the 'generation' of the offspring, which is one more than the 'generation' of the highest 'generation' attribute.<ref>{{cite news|url=https://techcrunch.com/2017/12/03/people-have-spent-over-1m-buying-virtual-cats-on-the-ethereum-blockchain/|title=People have spent over $1M buying virtual cats on the Ethereum blockchain|last=Tepper|first=Fitz|work=TechCrunch|access-date=2017-12-10|language=en}}</ref>


A CryptoKitty does not have a permanently assigned gender. While they can only engage in one breeding session at one time, each cat is able to act as either matron or sire.<ref>{{Citation |title=The CryptoKitty Bounty Program is NOW CLOSED |date=2023-04-03 |url=https://github.com/dapperlabs/cryptokitties-bounty |access-date=2023-04-09 |publisher=Dapper Labs}}</ref> There is a 'cooldown' time that indicates how soon the cat can breed again, which goes up with the number of breeds, capped at one week.{{Citation needed|date=December 2022}}
⚫ == Technology ==


The virtual cats are static images that can only be purchased, bred and sold. The game has no goal.<ref name="mashable"/>
Based on the limited number of cats going into circulation and their limited genomes, there is a limit of 4 billion total cats that can be bred.<ref name=":0" /> These have variations in phenotypes (what you see) and genotypes (what you don't see).


==Technology==
According to the company's website, CryptoKitties is a non-fungible token ERC #721 that is indivisible and unique.
''CryptoKitties'' operates on ]'s underlying blockchain network. Each CryptoKitty is a ] (NFT). Each is unique and owned by the user, validated through the blockchain, and its value can appreciate or depreciate based on the market. CryptoKitties cannot be replicated and cannot be transferred without the user's permission, even by the game developers. Users can interact with their CryptoKitties, having the ability to buy, sell, and sire (breed) them. However, the CryptoKitty art is not on the blockchain and is instead owned by Axiom Zen. The company released some of the art under a new 'Nifty' license that lets players use the image of their CryptoKitty in a limited way.<ref name=":1"/>


==History==
CryptoKitties ownership is tracked via a smart contract on the Ethereum blockchain. CryptoKitties will be distributed automatically, via smart contract, at the rate of one every 15 minutes (672 per week) for one year.
A test version of ''CryptoKitties'' was unveiled at ETH Waterloo on October 19, 2017, an Ethereum ]. The game launched on 28 November 2017 following a five-day ].<ref name="ieee">{{cite news |last1=Smith |first1=Matthew S. |title=The Spectacular Collapse of CryptoKitties, the First Big Blockchain Game - IEEE Spectrum |url=https://spectrum.ieee.org/cryptokitties |access-date=23 September 2023 |work=] |date=10 August 2022 |language=en}}</ref>


Genesis, the first high selling cat, was sold for ETH246.9255 (~]117,712) in December 2017.<ref>{{Cite web |last=Tepper |first=Fitz |date=2017-12-03 |title=People have spent over $1M buying virtual cats on the Ethereum blockchain |url=https://techcrunch.com/2017/12/03/people-have-spent-over-1m-buying-virtual-cats-on-the-ethereum-blockchain/ |access-date=2024-09-15 |website=] |language=en-US}}</ref>
Each cat will have a distinct visual appearance (“phenotype”) determined by its immutable genes (“genotype”) stored in the smart contract. Because cats are tokens on a blockchain, they can be bought, sold, or transferred digitally, with strong guarantees of ownership. CryptoKitties do not have a permanently assigned gender. While they can only engage in one breeding session at one time, each cat is able to act as either matron or sire. The owner chooses with each breeding interaction


On March 20, 2018, it was announced that ''CryptoKitties'' would be spun off into its own company, Dapper Labs,<ref name=":2">{{Cite web|url=https://venturebeat.com/2018/11/01/cryptokitties-creator-dapper-labs-raises-15-million-to-build-more-blockchain-cats/|title=CryptoKitties creator Dapper Labs raises $15 million to build more blockchain cats|date=2018-11-01|website=VentureBeat|language=en-US|access-date=2019-05-19}}</ref> and raised $12 million from several top venture capital firms and angel investors. The investment round was led by New York based ] and San Francisco based ].<ref>{{cite news|url=https://venturebeat.com/2018/03/20/cryptokitties-blockchain-sensation-raises-12-million/|title=CryptoKitties blockchain sensation raises $12 million|date=2018-03-20|work=VentureBeat|last=Takahashi|first=Dean|access-date=2018-03-26|language=en-US}}</ref><ref>{{Cite web|url=https://medium.com/cryptokitties/cryptokitties-receives-12m-in-funding-38322f90ab65|title=CryptoKitties receives $12M in funding|last=CryptoKitties|date=2018-03-20|website=CryptoKitties|access-date=2018-03-26}}</ref>
⚫ A group known as Axiom Zen innovation studio developed the game.<ref>{{Cite news|url=https://www.bloomberg.com/news/articles/2017-12-04/cryptokitties-quickly-becomes-most-widely-used-ethereum-app|title=CryptoKitties Mania Overwhelms Ethereum Network's Processing|date=2017-12-04|work=Bloomberg.com|access-date=2017-12-10}}</ref> Until November 2018, Axiom Zen intends to release a new CryptoKitty every 15 minutes,<ref name=":0" /> with the rest of supply determined by breeding of crypto-kitties. Crypto-kitties owners may put them up for sale for a price set in ethers.

On May 12, 2018, a CryptoKitty was sold for $140,000.<ref>{{cite web |last1=Mala |first1=Elisa |title=Who Spends $140,000 on a CryptoKitty? (Published 2018) |url=https://www.nytimes.com/2018/05/18/style/cryptokitty-auction.html |website=The New York Times |access-date=11 October 2020 |date=18 May 2018}}</ref> In May 2018, ''CryptoKitties'' launched their first celebrity-branded CryptoKitty with ], an American professional basketball player. As part of the partnership, Curry was given three CryptoKitties with special imagery, the first of which he put up for ].<ref>{{cite news|url=https://venturebeat.com/2018/05/07/warriors-steph-curry-will-auction-off-celebrity-cryptokitties/|title=Warriors' Steph Curry will auction off celebrity CryptoKitties|date=2018-05-07|work=VentureBeat|access-date=2018-05-11|language=en-US}}</ref> The company later suspended the auction, claiming that Stephen Curry was not as involved as they initially thought.<ref>{{cite news |last1=Filiba |first1=Jack |title=Updated: NBA Player Stephen Curry Partners with CryptoKitties to Release CurryKitties |url=https://news.coinsquare.com/entertainment/nba-stephen-curry-cryptokitties-currykitties/ |access-date=30 September 2022 |date=May 19, 2018}}</ref> The company was later sued for trade secret theft over the Stephen Curry collectibles.<ref>{{cite news|url=https://venturebeat.com/2018/05/25/cryptokitties-sued-for-trade-secret-theft-over-stephen-curry-collectibles/|title=CryptoKitties sued for trade secret theft over Stephen Curry collectibles|date=2018-05-25|work=VentureBeat|access-date=2018-05-29|language=en-US}}</ref> The court ruled in the company's favour, stating that "he evidence demonstrates that Defendant, not Plaintiff, developed the idea to license digital collectibles using the likeness of celebrities first…".<ref>{{cite news|url=https://scholar.google.co.il/scholar_case?case=12231314928451214575&hl=en&as_sdt=6&as_vis=1&oi=scholarr/|title=FOUNDER STARCOIN, INC., a California Corporation, Plaintiff, v. LAUNCH LABS, INC., a Canada Corporation doing business as Axiom Zen, Defendant.|date=2018-07-09|access-date=2019-09-19|language=en-US}}</ref>

In October 2018, ''CryptoKitties'' reached the milestone of 1 million cats being bred with a volume of 3.2 million transactions on its smart contracts.<ref name=":1"/> In November 2018, Dapper Labs, which was spun out of Axiom Zen as the developer of ''CryptoKitties'', raised an additional $15 million in a venture round led by ]. The company doubled its valuation in this round.<ref>{{cite news|url=https://www.bloomberg.com/news/articles/2018-11-01/cryptokitties-maker-doubles-valuation-in-venrock-led-fundraising|title=CryptoKitties Maker Doubles Valuation in Venrock-Led Fundraising|newspaper=Bloomberg.com|date=November 2018|access-date=2018-11-01}}</ref><ref name=":2" />

In 2018, ''CryptoKitties'' was used by the German museum ] to showcase blockchain technology.<ref>{{cite web |last1=Takahashi |first1=Dean |title=CryptoKitties will help German museum explain blockchain |url=https://venturebeat.com/2018/08/28/cryptokitties-will-help-german-museum-explain-blockchain/ |website=Venture Beat |access-date=7 October 2018 |date=28 Aug 2018}}</ref><ref>{{cite web |last1=Cant |first1=Joeri |title=CryptoKitties at German art exhibit 'Bringing Blockchain to Life' |url=https://www.chepicap.com/en/news/3286/cryptokitties-at-german-art-exhibit-bringing-blockchain-to-life-.html |website=Chepicap |access-date=7 October 2018 |date=29 Aug 2018 |archive-url=https://web.archive.org/web/20180830005204/https://www.chepicap.com/en/news/3286/cryptokitties-at-german-art-exhibit-bringing-blockchain-to-life-.html |archive-date=30 August 2018 |url-status=dead }}</ref>

By 2022, the game had fallen to generally fewer than 100 sales a day, for a total value of less than $10,000.<ref name="ieee"/>

⚫ == Technology ==

A CryptoKitty's ownership is tracked via a ] on the Ethereum blockchain. Each CryptoKitty is represented as a ] using the ERC-721 token standard on Ethereum. Generation 0 CryptoKitties were sold to players in an auction at the rate of one every 15 minutes (672 per week) for one year. New CryptoKitties are created by breeding existing CryptoKitties.{{Citation needed|date=December 2022}}

Based on the limited number of cats going into circulation and their limited genomes, there is a limit of around 4 billion total cats that can be bred.<ref name=":0" /> Each cat has a distinct visual appearance ("phenotype") determined by its immutable genes ("genotype") stored in the smart contract. Because cats are tokens on a blockchain, they can be bought, sold, or transferred digitally, with strong guarantees of ownership.{{Citation needed|date=December 2022}}

⚫ Axiom Zen developed the game.<ref>{{cite news|url=https://www.bloomberg.com/news/articles/2017-12-04/cryptokitties-quickly-becomes-most-widely-used-ethereum-app|title=CryptoKitties Mania Overwhelms Ethereum Network's Processing|date=2017-12-04|work=Bloomberg|access-date=2017-12-10}}</ref> Until November 2018, Axiom Zen intended to continually release a new CryptoKitty every 15 minutes,<ref name=":0" /> with the rest of supply determined by breeding of CryptoKitties. CryptoKitty owners may put them up for sale via an auction for a price set in Ether (ETH). They could also put them up for sire, where another player can pay to breed with a specific CryptoKitty.{{Citation needed|date=December 2022}}


== Reception == == Reception ==
Shortly after launch, there were concerns that ''CryptoKitties'' was crowding out other businesses that use the Ethereum platform. The game caused an increase in pending transactions on Ethereum, and at one point accounted for about 25% of network traffic on Ethereum.<ref name=":0"/><ref>{{cite news|url=https://www.bbc.com/news/technology-42237162|title=CryptoKitties cripple Ethereum blockchain|date=2017-12-05|work=BBC News|access-date=2017-12-11|language=en-GB}}</ref> Ethereum ] increased the gas limit in response to ''CryptoKitties'', which allowed for more data per block and increasing transactions per second.<ref>{{Cite web|last=Wong|first=Joon Ian|title=CryptoKitties is jamming up the ethereum network|url=https://qz.com/1145833/cryptokitties-is-causing-ethereum-network-congestion/|access-date=2021-12-05|website=Quartz|date=4 December 2017 |language=en}}</ref> A variety of similar websites, such as Etheremon, Ethertulips, and CryptoBots, were also created. Marketplace sites such as ] and RareBits were created as a response.<ref>{{Cite web|url=https://techcrunch.com/2018/04/19/rare-bits-crypto-marketplace/|title=Crypto-collectibles and Kitties marketplace Rare Bits raises $6M|website=TechCrunch|date=19 April 2018|language=en-US|access-date=2019-05-19}}</ref> In March 2021 CryptoKitties announced plans to switch to the Flow blockchain in the "near future".<ref name="Engadget 2021-03-11">{{cite news |url=https://www.engadget.com/nft-explainer-digital-art-collectibles-blockchain-environment-business-investment-cryptocurrency-153023551.html |title=NFTs are both priceless and worthless |work=Engadget |date=2021-03-11 |access-date=2021-04-09 }}</ref>
There are concerns that Cryptokitties is crowding out more serious, significant business that use the Ethereum platform. As of December 5, 2017 Etherscan has reported a sixfold increase in pending transactions on Ethereum since the game's release just a week earlier. "CryptoKitties has become so popular that it's taking up a significant amount of available space for transactions on the Ethereum platform," said Garrick Hileman, from the University of Cambridge.<ref>{{Cite news|url=http://www.bbc.com/news/technology-42237162|title=CryptoKitties cripple Ethereum blockchain|date=2017-12-05|work=BBC News|access-date=2017-12-11|language=en-GB}}</ref>


==See also==
Ethereum miners increased the gas limit in response to CryptoKitties.
*]
*]


== References == == References ==
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Latest revision as of 19:15, 11 December 2024

2017 blockchain game on Ethereum 2017 video game
CryptoKitties
Developer(s)Dapper Labs
Publisher(s)Dapper Labs
Platform(s)Ethereum
ReleaseNovember 2017
Genre(s)Virtual pet

CryptoKitties is a blockchain game developed by Canadian studio Dapper Labs. The game allows players to buy, sell, and create non-fungible tokens (NFTs) using Ethereum. These NFTs represent virtual cats. The game's popularity in December 2017 congested the Ethereum network, causing it to reach an all-time high in the number of transactions and slowing it down significantly.

Dapper Labs was spun-off from Axiom Zen. Both companies are based in Vancouver, Canada. CryptoKitties is the first major game to use blockchains, and one of the earliest examples of a blockchain project designed for recreation.

Gameplay

Players purchase, breed and trade virtual cats that have different visual features of varying levels of rarity. Players must purchase Ether cryptocurrency to join the game, and spend it to perform each breeding and trade action within the game.

The virtual cats are breedable and carry a unique number and 256-bit distinct genome with DNA and different attributes (known as "cattributes") that can be passed to offspring. Several traits can be passed down from the parents to the offspring. There are a total of 12 cattributes for any cat, including pattern, mouth shape, fur, eye shape, base color, accent color, highlight color, eye color, and optional wild, environment, 'purrstige' and 'secret'. Other features like cool downtimes are not passed down, but are instead a function of the 'generation' of the offspring, which is one more than the 'generation' of the highest 'generation' attribute.

A CryptoKitty does not have a permanently assigned gender. While they can only engage in one breeding session at one time, each cat is able to act as either matron or sire. There is a 'cooldown' time that indicates how soon the cat can breed again, which goes up with the number of breeds, capped at one week.

The virtual cats are static images that can only be purchased, bred and sold. The game has no goal.

Technology

CryptoKitties operates on Ethereum's underlying blockchain network. Each CryptoKitty is a non-fungible token (NFT). Each is unique and owned by the user, validated through the blockchain, and its value can appreciate or depreciate based on the market. CryptoKitties cannot be replicated and cannot be transferred without the user's permission, even by the game developers. Users can interact with their CryptoKitties, having the ability to buy, sell, and sire (breed) them. However, the CryptoKitty art is not on the blockchain and is instead owned by Axiom Zen. The company released some of the art under a new 'Nifty' license that lets players use the image of their CryptoKitty in a limited way.

History

A test version of CryptoKitties was unveiled at ETH Waterloo on October 19, 2017, an Ethereum hackathon. The game launched on 28 November 2017 following a five-day closed beta.

Genesis, the first high selling cat, was sold for ETH246.9255 (~US$117,712) in December 2017.

On March 20, 2018, it was announced that CryptoKitties would be spun off into its own company, Dapper Labs, and raised $12 million from several top venture capital firms and angel investors. The investment round was led by New York based Union Square Ventures and San Francisco based Andreessen Horowitz.

On May 12, 2018, a CryptoKitty was sold for $140,000. In May 2018, CryptoKitties launched their first celebrity-branded CryptoKitty with Stephen Curry, an American professional basketball player. As part of the partnership, Curry was given three CryptoKitties with special imagery, the first of which he put up for auction. The company later suspended the auction, claiming that Stephen Curry was not as involved as they initially thought. The company was later sued for trade secret theft over the Stephen Curry collectibles. The court ruled in the company's favour, stating that "he evidence demonstrates that Defendant, not Plaintiff, developed the idea to license digital collectibles using the likeness of celebrities first…".

In October 2018, CryptoKitties reached the milestone of 1 million cats being bred with a volume of 3.2 million transactions on its smart contracts. In November 2018, Dapper Labs, which was spun out of Axiom Zen as the developer of CryptoKitties, raised an additional $15 million in a venture round led by Venrock. The company doubled its valuation in this round.

In 2018, CryptoKitties was used by the German museum ZKM Center for Art and Media Karlsruhe to showcase blockchain technology.

By 2022, the game had fallen to generally fewer than 100 sales a day, for a total value of less than $10,000.

Technology

A CryptoKitty's ownership is tracked via a smart contract on the Ethereum blockchain. Each CryptoKitty is represented as a non-fungible token using the ERC-721 token standard on Ethereum. Generation 0 CryptoKitties were sold to players in an auction at the rate of one every 15 minutes (672 per week) for one year. New CryptoKitties are created by breeding existing CryptoKitties.

Based on the limited number of cats going into circulation and their limited genomes, there is a limit of around 4 billion total cats that can be bred. Each cat has a distinct visual appearance ("phenotype") determined by its immutable genes ("genotype") stored in the smart contract. Because cats are tokens on a blockchain, they can be bought, sold, or transferred digitally, with strong guarantees of ownership.

Axiom Zen developed the game. Until November 2018, Axiom Zen intended to continually release a new CryptoKitty every 15 minutes, with the rest of supply determined by breeding of CryptoKitties. CryptoKitty owners may put them up for sale via an auction for a price set in Ether (ETH). They could also put them up for sire, where another player can pay to breed with a specific CryptoKitty.

Reception

Shortly after launch, there were concerns that CryptoKitties was crowding out other businesses that use the Ethereum platform. The game caused an increase in pending transactions on Ethereum, and at one point accounted for about 25% of network traffic on Ethereum. Ethereum miners increased the gas limit in response to CryptoKitties, which allowed for more data per block and increasing transactions per second. A variety of similar websites, such as Etheremon, Ethertulips, and CryptoBots, were also created. Marketplace sites such as OpenSea and RareBits were created as a response. In March 2021 CryptoKitties announced plans to switch to the Flow blockchain in the "near future".

See also

References

  1. ^ Miller, John (29 Jan 2018). "Animoca Brands one of the ASX top performers in 2018". Proactive Investors. Retrieved 7 October 2018.
  2. ^ Takahashi, Dean (6 October 2018). "CryptoKitties explained: Why players have bred over a million blockchain felines". VentureBeat. Retrieved 2021-05-22.
  3. "CryptoKitties craze slows down transactions on Ethereum". 5 December 2017. Retrieved 7 October 2018.
  4. Takahashi, Dean (1 November 2018). "CryptoKitties creator Dapper Labs raises $15 million to build more blockchain cats". VentureBeat.
  5. "@dapperlabs" on Twitter
  6. "@axiomzenteam" on Twitter
  7. ^ Schroeder, Stan (4 December 2017). "How to play CryptoKitties, the insanely popular crypto game". Mashable. Retrieved 17 November 2021.
  8. ^ Cheng, Evelyn (2017-12-06). "Meet CryptoKitties, the $100,000 digital beanie babies epitomizing the cryptocurrency mania". CNBC. Retrieved 2017-12-10.
  9. Tepper, Fitz. "People have spent over $1M buying virtual cats on the Ethereum blockchain". TechCrunch. Retrieved 2017-12-10.
  10. The CryptoKitty Bounty Program is NOW CLOSED, Dapper Labs, 2023-04-03, retrieved 2023-04-09
  11. ^ Smith, Matthew S. (10 August 2022). "The Spectacular Collapse of CryptoKitties, the First Big Blockchain Game - IEEE Spectrum". IEEE. Retrieved 23 September 2023.
  12. Tepper, Fitz (2017-12-03). "People have spent over $1M buying virtual cats on the Ethereum blockchain". TechCrunch. Retrieved 2024-09-15.
  13. ^ "CryptoKitties creator Dapper Labs raises $15 million to build more blockchain cats". VentureBeat. 2018-11-01. Retrieved 2019-05-19.
  14. Takahashi, Dean (2018-03-20). "CryptoKitties blockchain sensation raises $12 million". VentureBeat. Retrieved 2018-03-26.
  15. CryptoKitties (2018-03-20). "CryptoKitties receives $12M in funding". CryptoKitties. Retrieved 2018-03-26.
  16. Mala, Elisa (18 May 2018). "Who Spends $140,000 on a CryptoKitty? (Published 2018)". The New York Times. Retrieved 11 October 2020.
  17. "Warriors' Steph Curry will auction off celebrity CryptoKitties". VentureBeat. 2018-05-07. Retrieved 2018-05-11.
  18. Filiba, Jack (May 19, 2018). "Updated: NBA Player Stephen Curry Partners with CryptoKitties to Release CurryKitties". Retrieved 30 September 2022.
  19. "CryptoKitties sued for trade secret theft over Stephen Curry collectibles". VentureBeat. 2018-05-25. Retrieved 2018-05-29.
  20. "FOUNDER STARCOIN, INC., a California Corporation, Plaintiff, v. LAUNCH LABS, INC., a Canada Corporation doing business as Axiom Zen, Defendant". 2018-07-09. Retrieved 2019-09-19.
  21. "CryptoKitties Maker Doubles Valuation in Venrock-Led Fundraising". Bloomberg.com. November 2018. Retrieved 2018-11-01.
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