If you like real-time strategy games, then you should try StarCraft. It is released on the PC and Mac but not on Linux, nor is it available on Steam.
user
{"name": "StarCraft", "genres": "real-time strategy", "platforms": "PC", "available_on_steam": "no", "has_linux_release": "no", "has_mac_release": "yes", "intention": "inform"}
assistant