Was I the only one who used to have an Amstrad CPC?
I too had one of these badboys, complete with crappy light pen that drew one pixel at a time. As for the best game, there can be only one:
www.laser-squad.co.uk/I spent many happy hours tracking down Sterner Regix and kicking his ass with my Marsec autogun. The above version you can download is great, amazing atmosphere for a 20 year old game with basic graphics.
AWESOME!