There are currently lots of ways to have fun playing games for free Bitcoins.
Get paid to play video games! You earn “Tremor coins” then exchange them in for Bitcoins! I have seen accountswith well over 400,000 Tremor coins! That would be worth .75 bTC or ~$448 for just playing games!
I personally have not tried this one out, but if you already play Minecraft I don’t see any reason why you wouldn’t add yourself to the list!