Open world 2D singleplayer games on PC (no roguelikes or metroidvanias)? For example: CrossCode, Siralim, 9th Dawn, Stardew Valley, Graveyard Keeper, Rimworld I guess, Factorio, Grim Dawn, Chronicon, Torchlight, Diablo, Last Epoch, Zomboid, Disgaea, Forager, Terraria, Starbound, Slormancer.