CryptoBots is fun. It's a little bit expensive though. I currently have around 8 bots and are renting them out for manufacturing to get my invest back to buy another bot or start fighting. This might take some time, since there are way more bots, then there are players, there is no shortage and the manufacturing prices are way lower than the costs for buying a robot.
Anyway, I get a little technical here. It's fun. :D
In contrast of cryptokitties, this guys are really trying to make a game. With battles, ranks, rivalry etc.