Game: Oh! Cube

When I first started playing Oh! Cube, I hated it. I wasn't prepared for its brand of grid-based number logic, and certainly not in 3D. With a lot of help from my math-loving girlfriend (and a little kicking and screaming), however, I was soon bursting blocks like a pro. It's for that reason that I can't recommend this game enough: it creeps up on you, teaches you its ways, then makes you forget there was ever a time when you didn't know them.