Vietnam 3275 is a sci-fi shoot 'em up developed by Stavros Fasoulas for the Commodore 64. It's a modified version of another game released in 1987, called Delta MK II (or Delta Patrol).
Armalyte is one of the best shooters ever created for the Commodore 64. This horizontally scrolling sci-fi shoot 'em up was developed by Cyberdyne Systems and published by Thalamus in 1988.
Armalyte: The Final Run is the enhanced version for 16-bit platforms of the Shoot 'Em Up created by Cyberdyne Systems/Thalamus in 1988 for the C64. The Final Run was published in 1991 for the Amiga and Atari ST.