i think the time is right to launch a game with its ingame economy tied to BTC.
just think how addictive diablo could be with monsters dropping satoshis and bosses mBtc. pay your subscription in BTC and earn it back while having fun.
Yes but it's totally not trivial to design it correctly.
The reason is that traditionally they use unbound currencies, creating and destroying them at will.
If you want to "back" game currencies with BTC, you would have to either have a limited amount of them, or take the risk of buying more funds.
Also, you'd need a strong business model.
Another approach would be to only "enable" players to use BTC as an in-game currency, without having it necessarily drop from monsters.
This would be much easier to do, but you would still have two huge problems:
1) you would be keeping player's money, with all the security problems this brings
2) some states might consider your game akin to gambling or worse, requiring you strange regulations