Xenomorph is a sci-fi RPG set in space, developed by Pandora and published in 1990 for the Amiga, Atari ST, MS-DOS, and - strangely - Commodore 64.
The title is clearly inspired by the movie Alien. In fact, the xenomorph is the race of the famous aliens of the film. Despite the settings, the game is a classic dungeon crawler, very similar to Dungeon Master in terms of gameplay. The perspective is first-person pseudo-3d, with movements to the left and right by 90°. Combat, as well as all the rest of the actions, are in real-time.
I cannot define graphics as exceptional: honestly, it's a bit too flat. In other words, don't expect the visuals of Eye of the Beholder, but yes, it can compete with Dungeon Master - no offense, FTL. Probably it's the limited number of colors. Anyway, despite this, Xenomorph can create a fantastic atmosphere. The game is a true precursor of the sci-fi survival horror genre (think about System Shock 2, for example). You will feel oppressed and often scared by the environment, and your only desire will be to go out from that cursed mining station.
If you love classic RPGs but prefer space stations to dungeons, or maybe you are just a fan of the movie Alien (who isn't?), Xenomorph is a must.