Best co-op horde shooter games

How we picked these games

This collection focuses on co-op shooters where the primary structure is surviving against waves of enemies. That means games built around defending positions, managing escalating threats, and fighting through rounds or missions where overwhelming numbers define the challenge. The game needs to have a clear horde element: lots of enemies coming at you in repeating or continuous waves and co-op built into that structure, not just tacked on. Games like GTFO and Alien Swarm: Reactive Drop fit because their entire design revolves around fighting waves of creatures with teamwork at the core. Warhammer 40,000: Space Marine 2 and Sker Ritual qualify for their dedicated horde-focused modes where survival against swarms is the point. RIPOUT and The Anacrusis both center on fighting through procedurally generated or dynamic waves of enemies in co-op. What tends to fall outside this scope: campaign-focused shooters where waves are just one part of the structure, battle royale or extraction shooters without a horde mechanic, or survival games where base-building and crafting overshadow the wave-defense rhythm. The focus here is on games where the horde is the main event, not a side activity.