Games like Spacefleet: Heat Death

Games like Spacefleet: Heat Death include Kerbal Space Program, Universe Sandbox, Kerbal Space Program 2, X4: Foundations, and Hardspace: Shipbreaker. We matched them by the tags players give Spacefleet: Heat Death on Steam (Simulation, Strategy, Space, Sandbox, and Physics): closest matches first, and among equally close ones the better-known games.