The best multiplayer tower defense game is Bloons TD 6, whose four-player co-op is the easiest way to get a group defending one map together, on PC or phone. For head-to-head players, the top pick is Legion TD 2, a competitive game where your build and your attack share one economy. Bloons suits friends who want to cooperate; Legion suits players who want to win against each other. Last verified September 14, 2026.
How we picked
- Every game here has real multiplayer, either co-op on the same side or versus play, not a solo campaign with leaderboards.
- Platforms checked: PC through Steam, plus mobile and console where the same multiplayer ships.
- We split the list into co-op and versus, because coordination and competition reward very different groups.
- Prices, player counts and update dates come from each game’s Steam or store listing, checked September 2026.
- Edited by Cody, mobile and MOBA editor. Full method: editorial policy.
The best multiplayer tower defense games at a glance
| Game | Platforms | Price model | Best for | Our rating | Last major update |
|---|---|---|---|---|---|
| Bloons TD 6 | PC, iOS, Android | Paid (about $14 on PC) | Four-player co-op | 9.0/10 | Sep 2026 |
| Sanctum 2 | PC | Paid | Shooter fans who build | 8.4/10 | May 2013 |
| Dungeon Defenders II | PC, PlayStation, Xbox | Free | Free co-op with hero roles | 8.0/10 | Sep 2026 |
| Legion TD 2 | PC | Paid | Competitive team play | 8.6/10 | Sep 2026 |
| Bloons TD Battles 2 | PC, iOS, Android | Free | One-on-one duels | 7.6/10 | Jul 2026 |
There are two flavors here. Co-op tower defense puts your whole squad on the same side, splitting a map or a set of roles, and lives or dies on coordination. Versus games pit you against other players, where your defense and your attack share the same wallet. The picks below are ranked from the easiest group pick-up to the most competitive.
1. Bloons TD 6
Bloons TD 6 is the best multiplayer tower defense game because its co-op is friendly, deep and everywhere. Up to four players share one map, split the lanes and stack monkey towers against escalating bloon waves. It is the pick for a group that wants to cooperate rather than compete.
Developer Ninja Kiwi released it in 2018 and still updates it constantly: the latest content, Social Seasons, arrived in September 2026 per the game’s Steam announcements. It runs about $13.99 on Steam and a few dollars on iOS and Android, and the four-player co-op works across the PC and mobile versions. Progress and heroes carry across your own devices.
The one concrete mechanic that makes co-op sing is shared cash split by lane: each player funds their own section, so a weak lane is visible and fixable in real time. That turns a quiet solo puzzle into a group scramble whenever a teammate’s side starts to leak.
Best for: friends who want deep, cooperative tower defense on any device.
Skip if: you want competitive versus play or a free game.
2. Sanctum 2
Sanctum 2 is the pick for shooter players who want to build the maze and then fight inside it. You place towers between waves, then drop into a first-person view to shoot the enemies your defenses miss, with up to four players covering the cores together.
Developer Coffee Stain Studios released it on Steam on May 15, 2013. It is no longer actively updated, so treat it as a finished, complete game rather than a live one, which is fine for a fixed-price co-op you play through with friends. It regularly appears in Steam sales at a low price.
The hook is the blend: building lanes rewards planning, but aiming rewards reflexes, and four classes with different weapons and towers give a squad clear roles. The trade is age, the visuals and matchmaking show their years.
Best for: FPS fans who want to shoot inside their own tower maze.
Skip if: you want an actively updated live game or mobile play.
3. Dungeon Defenders II
Dungeon Defenders II is the best free co-op pick, mixing action-RPG heroes with tower defense. Each player picks a hero with unique defenses, builds during the setup phase, then fights alongside the towers when the wave hits. It is the group game for players who want loot and roles as well as lanes.
Developer Chromatic Games launched it free-to-play in 2017 and still runs live events: the Harvest Moon Festival ran in September 2026. It is on PC, PlayStation and Xbox with cross-play, so a mixed-platform group can defend the same Eternia Crystal together at no cost.
The role split is the mechanic that matters: a squad divides defense types across heroes, so one player’s gaps are another’s specialty. Being free-to-play, it leans on cosmetic and progression monetization, which is the main thing to weigh before you commit a group to it.
Best for: groups who want free, loot-driven co-op with distinct hero roles.
Skip if: you dislike free-to-play progression systems.
4. Legion TD 2
Legion TD 2 is the top competitive multiplayer tower defense game, a versus format where you spend one pool of gold on both defense and attack. You build fighters to survive waves and to send units at opponents, and a single weak player can sink the whole team. It is the pick for groups who want to compete, not just cooperate.
Developer AutoAttack Games released it on Steam on October 1, 2021, priced at $24.99, and keeps it current with ranked seasons: the v26.9 major update shipped in September 2026. Its official site tracks the competitive ladder and patch history.
The shared-economy mechanic is what sets it apart: every unit you send to attack is money not spent on your own defense, so bluffing and timing decide matches as much as raw building. That depth is also the barrier, it has a real learning curve and the paid entry keeps it a committed-group game.
Best for: competitive players who want ranked, high-skill versus tower defense.
Skip if: you want a casual co-op night or a free game.
5. Bloons TD Battles 2
Bloons TD Battles 2 is the accessible versus pick: a free one-on-one duel where you defend your own track while sending bloons to overwhelm your opponent’s. It takes the familiar Bloons towers and turns them into a fast, head-to-head race. It is the easy entry point for players who want competition without a steep price or learning curve.
Developer Ninja Kiwi released it in 2021 and updates it regularly: Update 4.13 arrived in the game’s Steam announcements in July 2026. It is free on PC, iOS and Android, with monetization through towers, heroes and cosmetics.
The core mechanic is the split screen economy: pop bloons to earn cash, then spend it either to defend or to send tougher bloons at your rival, so every dollar is an attack-or-defend decision. The trade is monetization, some towers and heroes sit behind unlocks that competitive players will want.
Best for: players who want quick, free one-on-one bloon duels.
Skip if: you want cooperative play or dislike unlock-based monetization.
Which one should your group play?
For a friendly co-op night, start with Bloons TD 6, or Dungeon Defenders II if you want a free game with hero roles. For shooter fans, Sanctum 2 is the standout. If your group would rather compete, Legion TD 2 is the deep, ranked pick and Bloons TD Battles 2 is the fast, free duel. For more, see our best free tower defense games and the best tower defense games on PC and Steam.
Frequently asked questions
What is the best multiplayer tower defense game?
Bloons TD 6 is the best overall because its four-player co-op is easy to set up, deep, and available on PC and mobile. If you prefer competitive versus play, Legion TD 2 is the strongest pick, with ranked seasons and a shared-economy format that rewards skill and timing over simple building.
Are there co-op tower defense games?
Yes. Bloons TD 6 supports four-player co-op on one map, Dungeon Defenders II is a free co-op game with cross-play on PC and consoles, and Sanctum 2 lets four players build and then shoot inside the maze. All three put your whole group on the same side against the waves.
What is the best free multiplayer tower defense game?
Dungeon Defenders II is the best free co-op game, with hero roles and cross-play across PC, PlayStation and Xbox. For free versus play, Bloons TD Battles 2 offers one-on-one duels on PC and mobile. Both are free to start and monetize through cosmetics, heroes and progression rather than a purchase price.
Can you play tower defense against other players?
Yes. Versus tower defense pits players against each other, sharing one economy for both defense and attack. Legion TD 2 is the deep, competitive option with ranked seasons, while Bloons TD Battles 2 is a lighter, free one-on-one duel. In both, sending units at your opponent costs money you could have spent defending.
How many players can play Bloons TD 6 co-op?
Bloons TD 6 co-op supports up to four players on a shared map, according to Ninja Kiwi’s Steam listing. Each player controls their own section and cash, so a squad splits the lanes and coordinates towers in real time. Co-op works across the PC, iOS and Android versions of the game.
