majority of the games are hidden faucets or bitcoin casinos
but here is my list of the games that allow to earn or use bitcoins in the process and are NOT casinos:
disclaimer:some of them may not pay or don't work anymore,haven't checked the list in  a while,feel free to leave your comments below

http://www.goldentowns.com/
http://townbi.com
http://islandforge.com/
https://bitcoin-arcade.com/
http://recursosbitcoin.com/bitcoin-boy-game/
http://flyingsatoshi.com/
http://dragons.tl/
http://minecraftcc.com/index.php?threads/get-paid-to-play-minecraft.4613/
http://islandforge.com/
http://www.minethings.com/
http://formulagame.xyz/
https://yabtcl.com
http://cashclamber.com
http://cow-keeper-coin.com
http://bitcoin2048.com/
http://8bitmmo.net/
http://www.strategygamenetwork.com/
http://coinquiz.openbitlab.com/
http://www.thebitles.com/
https://www.gambit.com/