Games like Orbital Defense 2899

Games like Orbital Defense 2899 include FTL: Faster Than Light, Crying Suns, Dungeon Warfare, Infested Planet, and Defense Grid: The Awakening. We matched them by the tags players give Orbital Defense 2899 on Steam (Strategy, Tower Defense, Sci-fi, Pixel Graphics, and Space): closest matches first, and among equally close ones the better-known games.