Ethermon

A surprisingly deep cryptocollectibles game. You can catch a monster, then train it... once it gets to a certain level, it will transform into a more mighty monster (based on it's ancestors, ie, DNA)

Once you've got a monster team, you can build your own castle (like, you know, a training gym) or travel around fighting other people's castles.

You can't even lose your Ethermons, your battles help you win their own currency called EMONT (although, your actual transactions are in Ethereum).

They claim to be the most popular crypto game in 2018... and given their depth and artwork, I wouldn't put too much effort into disputing that.