The closest matches on Steam are EARTH DEFENSE FORCE 4.1 The Shadow of New Despair, Alien Swarm: Reactive Drop, EARTH DEFENSE FORCE 5, Risk of Rain 2 and STAR WARS Battlefront (Classic, 2004).
From the Steam games with at least 2,000 reviews and 80% or more positive, we keep the ones whose main player tags match Warhammer 40,000: Space Marine 2's most closely, then show the closest first.
