CryptoAlpaca - Adopt unique alpaca on blockchain and shear wools everyday
CryptoKitties - Breed and collect adorable creatures using Ethereum
Mars Genesis - 10,000 unique parcels of Mars stored on the blockchain
Loot - Loot is a bank account ledger.
CryptoFighters - Collect, train and battle with unique fighters with Ethereum
Crypto Corgis - Crypto corgis live (and die) on the blockchain