Intresting topic...
Don't game much but I'd have to say:
1. Quake
2. Body Blows Galactic
3. Pinball dreams
4. Beneth a steel Sky (CD32 version)
But the BEST game of all time is:
Waiting For OS4.0! Anyone can play, no one knows how it will turn out and in the end, we're all losers! LOL!