ONI is very similar to RimWorld, but it's set in a fictional Astronomy trope. I find the cartoonish 2D characters and critters are very adorable, full of emotion, and I love to watch them interact with each other during break time. They give me a reason to smile at times. I love the challenging learning curve, and there's a lot of science involved (temperature, different biomes, gases, viruses) and there's a lot of replay value to ONI. I've been purchasing DLCs to the game on Steam, but I would love to buy a copy on GOG to preserve one of my favorite resource management colony sim.