All games are faucets. You can play on minecraftcc.com. They pay straight up for mining out any new block. I believe they are free.
The other one is 5 dollars and you're in the game. Free to earn after that. The server admin has stated that is all you need and you can play for free. There is no need to donate after that. The big donaters fuel the servers, but it isn't neccessary.

If you want a game where everyone can get free bitcoins without any sort of donation/pay to play method, how would they ever stay afloat?

If you want a 3d game that allows you to give hashes while you play, I wouldn't expect much graphically while your GPUs are trying to do 2 things at once.

A neat GUI faux RPG like Progress Quest masking a miner... that'd be entertaining.