Joemonkey
Diamond Member
Puzzle game available on Steam, you're supposed to take elements and make molecules (to oversimplify it). Has a great tutorial. Here's a video with someone explaining it (he talks too slow) but it gives you a good idea of the game. The demo is on Steam too, and pretty darn long for a demo!
http://www.youtube.com/watch?v=RjYOYtd298o
http://www.youtube.com/watch?v=RjYOYtd298o