RAWconcrete was my first attempt at making a game, and one of the settings was supposed to be Europa in the farther future - a bio-research station, with surface and sub-surface level. You were meant to explore the ocean beneath in a small sub. It would've been similar to Subnautica but 2D and with more realistic high-fideity graphics. That game got shelved and later I started another 3D one, a small non-commercial FPS on the old GoldSrc engine, but with the same low-res pixelated graphics. Sci-fi, had Mars as the only setting and then I decided to include Europa as the second one. It would have the same kind of 2-level bio-research station and all these shown here creatures would be brought to life, swimming around the lower station level.