Omg. Mercenary was a game that left a huge mark on me. I played it on Commodore PLUS/4 when I was 9. The freedom to explore! The hidden elevator far outside the city. The destructible buildings. The satellite!

100 paces NW of the starting position is an invisible patch of grass where the author forgot to include a height check. Press E and you teleport to the Colony Craft, far above you. This bug has gone unnoticed for 41 years!