The New era of blockchain based gaming has begun which gives rewards that can be traded

Check out the list 

Ethereum Blockchain Based Games

1. cryptokitties
2. Ethermon
3. Cryptopets
4. Etherarmy
5. Pandarium
6. Fishbank
7. Cryptopunks
8. Cryptopuppies
9. Cryptofighters
10. Etherstocks

Disclaimer: All these games require real. assets (ether). Don't play with more than you are willing to lose.

Steem Blockchain based games 

1. Steemnova

Here is the link: https://steemnova.intinte.org/index.php?ref=778