Two:
1) Rescue On Fractalus! (Atari 800XL)
My heart leapt every time a Jaggie leapt up in front of the ####pit...and the suspense of the steps as the pilot / Jaggie ran up to your spacecraft - just brilliant.
2) Mercenary - Escape From Targ
The sudden realisation that you have a whole WORLD, in 3D vector graphics, to explore...no time limits, you can't "die"... You're wits againts the game and the way you learned / plot unfolded as you went along and all available in a 48k version too! Still my vote for best game of all time.
