Tower defense is great solo — but defending a map with a friend, shouting "they're breaking through on the left!", is a completely different kind of fun. The catch is that co-op TD is weirdly hard to find, because the vast majority of the genre is single-player only. So we did the digging. Here are the 13 best co-op tower defense games in 2026 across Steam, Nintendo Switch, console, and browser, sorted by how you want to play together — action co-op, strategy co-op, and instant free picks.
Quick picks, by how you want to team up:
- Action co-op (you're in the fight)? → Orcs Must Die! 3, Sanctum 2
- Pure strategy co-op? → Bloons TD 6 (4P), Legion TD 2 (team vs team)
- Couch co-op on Switch? → PixelJunk Monsters 2
- Play with/vs others right now, free? → Kiomet, Battle Arena
Don't want everyone to buy and install the same game? These competitive browser games let you jump in against others instantly, free.
Play Free Multiplayer TD →Quick Comparison: 7 Top Co-op TD Games
Co-op games live or die on the details — how many players, which platforms, and whether it's relaxed teamwork or a competitive grind. Here's the at-a-glance view:
| Game | Platforms | Players | Style |
|---|---|---|---|
| Orcs Must Die! 3 / Deathtrap | Steam, Console | 2 | Action + traps |
| Sanctum 2 | Steam, Console | Up to 4 | FPS + TD |
| Bloons TD 6 | Steam, Switch, Mobile | Up to 4 | Strategy |
| PixelJunk Monsters 2 | Steam, Switch, PS4 | Up to 4 | Couch co-op |
| Legion TD 2 | Steam | 2v2 / 4v4 | Competitive team |
| Dungeon Defenders: Awakened | Steam, Console | Up to 4 | Action-RPG TD |
| Kiomet | Browser | Multiplayer | Real-time RTS-TD |
Best Action Co-op Tower Defense
These blend third-person or FPS action with classic trap-and-tower defense — you're in the fight, not just watching from above.
1. Orcs Must Die! 3 & Deathtrap
The undisputed king of co-op TD. You and a friend place devious traps, then jump in third-person to personally blast (and bowl, and flatten) waves of orcs. Deathtrap, the newest entry, adds roguelite progression and is built ground-up for co-op. If you only buy one game on this list, make it this.
2. Sanctum 2
The original first-person-shooter tower defense. Build your maze of towers, then grab a gun and defend the core yourself. Four-player co-op makes it chaotic in the best way — the go-to pick for teams who want to shoot as well as strategize.
3. Dungeon Defenders: Awakened
Part action-RPG, part tower defense, with loot, hero classes, and deep build customization. Four-player co-op and endless gear grind make it a long-haul favorite for friend groups.
Best Strategy Co-op Tower Defense
4. Bloons TD 6
The most popular pure-strategy co-op TD, full stop. Up to four players share a map and bank, each managing their own zone — great for both casual sessions and trying to beat brutal expert maps as a team. New to it? See our list of games like Bloons TD 6 for more.
5. PixelJunk Monsters 2
An adorable, deceptively deep TD where you physically move your character to build and upgrade towers. Local and online co-op make it a fantastic Switch couch pick — easy to learn, charming, and strategic on higher difficulties.
6. Legion TD 2
The most strategic team TD on this list. Born from the legendary Warcraft 3 custom map, it's a "build your lane, send creeps at the enemy team" game that's as much about co-op coordination as it is defense. Has a free-to-play option, too.
Want competitive TD without a Steam purchase? Jump into a live match against other players right now, free in your browser.
Play Kiomet Now →Free & Browser Co-op / Competitive TD — Play Now
No download, no buying four copies — these let you play with or against others instantly, right here:
7. Kiomet
A real-time multiplayer strategy-defense game where you expand territory and clash with other players live. The closest thing to competitive TD you can jump into in one click.
8. Battle Arena
Fast, combative defense action you can fire up instantly in your browser — a great quick fix when you want a competitive edge without installing anything.
9. Clash of Warriors
Send your forces and defend in this strategy clash — a browser-friendly way to scratch the head-to-head TD itch. Free and instant.
More Co-op TD Worth Trying (10–13)
- Plants vs. Zombies: Garden Warfare (Steam, Console) — the shooter spin-off keeps the PvZ charm with full team co-op.
- Tower Defense Simulator (Roblox) — free 4-player co-op; see our best Roblox TD games guide.
- Iron Brigade (Steam) — mech-driven co-op TD with a charming WW2-pulp aesthetic.
- Tower Battles (Roblox) — co-op survival plus a fun send-enemies PvP mode.
How to Pick the Right Co-op TD
- Want action and to be in the fight? Orcs Must Die or Sanctum 2.
- Want pure strategy with friends? Bloons TD 6 (4P) or Legion TD 2 (team vs team).
- Couch co-op on Switch tonight? PixelJunk Monsters 2 is the easiest to pick up together.
- No download, right now? Kiomet or browse our 60+ free tower defense games.