Ether Rock - Pet Rocks On The Blockchain
Launched in 2017, EtherRock was one of the first crypto collectible NFT-type projects on the Ethereum blockchain, having launched shortly after CryptoPunks. Only 100 rocks can ever be available, and each new virgin rock gets more and more expensive. This game is built entirely on the Ethereum blockchain, with a decentralized smart contract (deployed here) used to manage everything including the buying and selling of rocks, their prices and owners (though this website is still necessary so you can see pretty pictures of the rocks).
These virtual rocks serve NO PURPOSE beyond being able to be brought and sold, and giving you a strong sense of pride in being an owner of 1 of the only 100 rocks in the game :)
How to play: you must be connected to the Ethereum mainnet to view info on rocks, and some Ether (the currency of Ethereum) to buy a rock. The easiest way to connect to the Ethereum mainnet is to use the MetaMask plugin for Chrome -- go ahead and install it (takes 1 minute), then refresh this page. To get Ether you will need to buy some from an exchange like Coinbase.
Latest Virgin Rock [Never Before Sold]
All Active (USED) Rocks
Once you connect to the Ethereum mainnet, information on all the rocks Ethereum users have brought would be shown below. Any rocks that users have listed for sale could also be brought here.