Base-building survival sim in an (abandoned?) multiplayer package. Though it only has a "mixed" 57% approval rating on Steam, the impression I'm getting is that it's a fine sci-fi experience up until the unfinished end game. Its negative ratings all seem to be by players who are (rightfully, since they paid for a product that was never delivered) upset that the developers went radio silent and stopped updating what was supposed to be an evolving online experience. Equipped with this knowledge, and getting the game for the price of "pressed enter giveaway," should hopefully make your experience with Outpost Zero a bit more positive than theirs. :P

Good luck!