Ah, Activision. What a wonderfully creative variety of games you put out in the 8-bit era. What a hollow shell of yourself you are today.
Ahem, sorry, got a bit nostalgic there for a moment. Anyway, here’s Pastfinder, one of my favourite shoot ’em ups on Atari 8-bit, and one of the most peculiarly interesting ones to boot. You take on control of a little jumping bug of a spacecraft as you attempt to track down alien antiquities.
Better be careful, though; the whole planet is irradiated, so time is of the essence if you want to keep all your hair and/or internal organs intact to enjoy your loot.
Atari A to Z 