Yeah I know, 2048 is already a geek game, BUT the one I'm going to introduce to you is even geekier.
It's name is Fe and it's all about chemical elements fusion. If you want to feel like Walter White (please, leave the blog if you don't know him) then you must give Fe a try and, as read by the site tagline, Fuse your way to the 56Iron tile
If your best results in Chemistry was D then you'll need this fusion guide taken from the web site. Geek addiction: the game takes into account also radioactive decay! :)