Hyperion is a single player mod for Doom II (GzDoom) in vein classic FPS scifi/horror theme like Quake or Doom64 highly inspired in Lovecraft universe.
Perfect
A very refreshing take for a Doom setting, with a good mix of visuals from D64 and Quake, some new enemies, weapons and the most difficult to achieve: a believable atmosphere of dread and isolation in space.
This is perfect, everything feels in the right place in a conundrum of dark feelings and obscure buildings. It's insane and original, a mix between Quake, Escher and smething horror and eerie, something that comes from Lovecraft himself.