The Odyssey (Stavros Fasoulas)

The Odyssey (not to be confused with the 1986 text adventure of the same game) is a 1984 public domain single player beat 'em up for the Commodore 64.

It was the very first game developed by Stavros Fasoulas. If that name sounds familiar, it's because after this, he went on to code the C64 classics Delta, Quedex, and Sanxion for Thalamus.