I had to slap myself in the face this week, when I discovered that the glorious Sokoban passed me by last year. It's a lovely puzzle game about chemical bonds, in which you shift atoms around small spaces in a bid to connect them all up.

It's very clever stuff, and it quickly gets to the point of making you want to reach into the screen and break the game with your bare fists, as such additional ideas are introduced as breaking bonds, doubling up on bonds, and pushing Helium around. The game is out today on Steam, so if you're the kind of person who only buys games via Valve (or you missed it first time around like me), you totally need to grab Sokobond today.