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.
Considering the power of most rigs to the average modern pc, you could just use 10-20% of the gpu to create great graphic, 2 to 4 7950 are overkill even for the top game at 2560x1600, so basically you can create a profiler so get 50% gpu in normal condition (average pc card), or 10% gpu with 4 cards or less, and the rest would be used for mining with a difficulty adjusted to the amount of players, so you always get a balanced number of coins around the world.
It wouldn't be just masking a miner, but create a real rpg gaming experience with all the basic elements and a virtual currency generated within the game, just like any mmorpg virtual currency but with a difference that it's limited overtime and can be easily exchanged with bitcoins or other altcoins.
My point is to bring more rpg players to the cryptocurrency world, because all current games are based on making just tiny bits of bitcoins but there is no real gaming experience behind, no real mmorpg fans would be hooked on this level of poor gameplay. The people who are playing those games, would most likely go through all the web faucets and gamble on the web casinos.