Suggest a game that can be played without a mouse.

All emulator games!

What about Vessel? :)

skyrim

starcraft 2 ;)

You made me remember those BOMBERMAN 8 players games I used to be involved in when I studied informatic...so much bans from PCs room...

Trackmania Nations Forever. It's free on Steam as well.

pretty much any board game

Super Crate Box

worms

Dustforce and N are both excellent platformers, no mouse necessary.

Hopscotch

the witcher 2, BL2, if u have game pad, unless u mean keyboard only?

lightfish, beat hazard, probably all the platforming titles.

A Console Game.

Dark Souls.

(Solaire is pretty cute, I dunno, is that enough?)

Limbo, Binding of Issac.

bit trip runner is annoyingly addictive