For those of you that are into some retro gaming with a little hint of minecraft, I recommend you try Terraria. It's around $10 and will suck you in once you get the controls down. It feels like a mix of Castlevania, Legend of Zelda, Minecraft, and a whole lot of other games I could list but then they may be too obscure. If you feel interested or are curious about the game, just follow the link up above to their site to watch a video of the game.
So far, Thal and I both have the game and have had a blast with it. We are planning on eventually trying multiplayer when we both have time.