I played a sci-fi themed MS-DOS game at a friend's house in the very early 90's that I have been trying to identify. Here are the details about it that I remember:
- At the beginning of the game you play as an astronaut or similar, and you walk around an introductory area which looked like a space station or moon base. The player character was fairly small compared to the screen size. It had a top-down perspective, but it was not a top-down space shooter/SHMUP. You walked around from place to place.
- I seem to remember a futuristic city-like theme for the buildings in the opening area with skyscrapers and highways (and maybe enemy tanks).
- Very early in the game, you cross a bridge that crumbles behind you as you walk across it. The bridge may have been made of hexagon-shaped tiles. After having the bridge crumble under me a number of times, I gave up and never played the game again.
- The game's intro showed ghost-like aliens which were holding/stealing... something... possibly floppy disks. The aliens sort of looked like the ghosts from Pac-Man.
- It had very simplistic graphics (maybe CGA, but I'm not sure), and the sound came from the internal PC speaker. It was probably installed via 3.5" floppy disks but could have even been on 5.25" floppies. It was definitely made before 1995, but I would estimate that it was probably made before 1990.
I initially thought that it may be Space Rogue (1989), but that's not it as far as I can tell. However, the space station sections of Space Rogue have similar look to the game I played. (Although the graphics in Space Rogue may have more detail than the game I played.) The player movement reminded me of the overworlds in the older Commander Keen games, but it was not Commander Keen either.