Online co-op Tower Defense games

Every online co-op Tower Defense game on Steam we know of, newest first. Add tags or a price band to narrow it down.

Showing 11–20 of 152 games matching Tower Defense · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players

A night survival horror where your flashlight is your best weapon. Scavenge by day, defend the beacon by night and survive 14 days — alone or with a friend in the new online co-op.

$
Released
Price
$ · Cheap
Players
👥 2–4 players
Reviews
66% of 3

An incremental swarm tower defense. Play solo or 2–4 player Steam co-op. Defend a doomed mining colony through a full campaign, infinite procedural maps and Workshop creations. Build towers. Call orbital strikes. Kill billions. The only good bug is a dead bug. Do your part!

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$
Released
Price
$ · Cheap
Players
👥 Up to 8 players
Reviews
100% of 8

Cut through thousands of undead and survive until rescue. ZedFall: Outbreak is a co-op twin‑stick roguelite where levelling and evolving upgrade cards unleash chaotic builds. Fight to the chopper, hold the generator in Tower Defence, or Scavenge supplies. Play solo or with up to 7 of your friends.

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
100% of 1

Compete at your pace in solo or fast-paced PvP tower defense while adapting to ever-changing paths. Survive infinite dimension loops, or defend alongside a friend in online co-op. Build powerful turret combinations, and climb a global ELO ladder.

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
100% of 1

Catnip Wars is a 1–4 player co-op tower defense. Play as scrappy Catbots defending your catnip farm from monster waves — build and power turrets, raise walls, harvest resources, man the BFG, revive fallen friends, and climb the tech tree. Play solo or online with friends. Achievements/Leaderboard

$$
Released
Price
$$ · Standard
Players
👥 Not stated

Bulwark Tower Defense is a competitive team tower-defense: wall your lane with auto-fighting units to hold back the waves, then spend essence to send monsters that break your rivals' defenses. Grow your economy, upgrade a shared King, and outlast the enemy team across 1v1–4v4.

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
97% of 480

When humanity fell, chickens took over. In this multi-perspective survival shooter, play as Earth's new ruler—a chicken! Scavenge loot, fortify base defenses, hold off zombie hordes, and launch the rocket. Ahem... or just throw a wasteland party for the survivor lady!

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$$
Released
Price
$$ · Standard
Players
👥 2–8 players
Reviews
100% of 4

Tower defense on rails. Wake the last war-train in a steampunk world that needs you: build your armored consist car by car, bristle it with turrets, and harvest fuel on the move as you hold the line across a vibrant frontier. Capture towns, upgrade your train, and follow a lone survivor onward.

$
Released
Price
$ · Cheap
Players
👥 Up to 8 players

Pilot 11 unique aircraft, defend your base, and battle other players in online co-op tower defense and up to 8-player PvP in this 3D arcade flight combat game.

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$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
71% of 14

Build and rearrange a tower packed with spells, creatures, relics and defenses in this Auto Battler. Chain positional bonuses, adapt to every shop, then battle real player-made towers in ranked asynchronous PvP solo or with a friend in online CO-OP.

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