First of all - lots of turn-based or slower games can be played with mouse only. That might not be his interest, however. Something like a Razer Naga[1], a mou

First of all - lots of turn-based or slower games can be played with mouse only. That might not be his interest, however. Something like a Razer Naga[1], a mouse with a ton of side buttons, could allow him to play other games with one hand. Probably not FPS though[2]. Other manufacturers will sell similar mice, I just thought of that one first and have no idea if it's the best. You could get an IPAC[3] or other arcade control board (I've used X-Arcade kits[4] with success for other projects) and build some kind of custom control surface, maybe using a trackball or joystick and some big arcade buttons. Final idea, if you're crazy: Bolt WASD onto a mouse, and wire in as extra mouse buttons or to a keyboard controller. [1] http://www.razerzone.com/gaming-mice/razer-naga-epic http://www.razerzone.com/gaming-mice/razer-naga-epic [2] Maybe sensors or pedals for movement? Seems like it would be hard to WASD with the side buttons on the mouse. That way you could get good enough mouse fidelity for aiming and still have enough buttons to do stuff. [3] http://www.ultimarc.com/ipac1.html http://www.ultimarc.com/ipac1.html [4] http://www.xgaming.com/store/arcade-parts-and-accessories/product/two-player-build-your-own-arcade-bundle-pcb/ http://www.xgaming.com/store/arcade-parts-and-accessories/pr...