Free to Play Tower Defense Games on Steam
Check out this fantastic list of free-to-play tower defense games you can enjoy on Steam right now, updated on September 14th 2025. Looking for even more free titles? Explore the complete list of the best free to play tower defense games.
Lists & Categories
1. Idle Hero TD - Tower Defense
Endless idle tower defense game full of deep strategy and combat mechanics. Unlock and upgrade dozens of epic fantasy heroes to defeat an infinite swarm of enemy monsters. Strategize hero positions, synergies, and skills for an effective defense, then sit back and let the auto-battler do its thing! Idle Hero TD - Tower Defense is a game developed and published by . Released on May 03rd 2024 has received 770 reviews of which 635 were positive and 135 were negative resulting in a rating of 7.8 out of 10. The game has hit the top spot as the #1 most played tower defense game, thanks to its 1,269 peak concurrent players over the last day.
7.8
635
135
1,269
players
2. The Perfect Tower II
The Perfect Tower II is a mix between an incremental and a tower defense game. Build a town, manage resources and explore a variety of mini-games and tons of upgrades. Fully automate your game and watch numbers going up! The Perfect Tower II is a game developed and published by . Released on February 26th 2021 has received 3,639 reviews of which 3,201 were positive and 438 were negative resulting in a rating of 8.5 out of 10. While seeing 462 players online at once in the last 24 hours, this game is currently ranked #2 among tower defense games based on player count.
8.5
3,201
438
462
players
3. Bloons TD Battles 2
From the creators of Bloons TD6... Bloons TD Battles 2 is a brand new installment of the top-rated head-to-head tower defense game. Gather your Hero, choose your team of powerful Monkey Towers, and prepare to battle one on one against other players and relentless waves of Bloons! Bloons TD Battles 2 is a game developed and published by . Released on November 30th 2021 has received 32,702 reviews of which 27,540 were positive and 5,162 were negative resulting in a rating of 8.3 out of 10. While seeing 432 players online at once in the last 24 hours, this game is currently ranked #3 among tower defense games based on player count.
8.3
27,540
5,162
432
players
4. Dungeon Defenders II
Dungeon Defenders II is a cooperative Action Tower Defense game packed with roleplaying elements like loot, leveling, and pets. Dungeon Defenders II is a game developed and published by . Released on June 20th 2017 has received 21,823 reviews of which 16,882 were positive and 4,941 were negative resulting in a rating of 7.6 out of 10. With 356 concurrent players in the last 24 hours, the game currently holds the #4 spot among the most played tower defense games.
7.6
16,882
4,941
356
players
5. Bloons Monkey City
Create, upgrade, and customize your very own Bloons Monkey City in this groundbreaking blend of city building and tower defense awesomeness! Bloons Monkey City is a game developed and published by . Released on April 10th 2020 has received 6,222 reviews of which 5,676 were positive and 546 were negative resulting in a rating of 8.8 out of 10. With 213 concurrent players in the last 24 hours, the game currently holds the #5 spot among the most played tower defense games.
8.8
5,676
546
213
players
6. Bloons TD Battles
Go head to head with other players in a Bloon-popping battle for victory. From the creators of best-selling Bloons TD 5, this all new Battles game is specially designed for multiplayer combat, featuring the ability to control bloons directly and send them charging past your opponent's defenses. Bloons TD Battles is a game developed and published by . Released on April 20th 2016 has received 29,096 reviews of which 26,414 were positive and 2,682 were negative resulting in a rating of 8.9 out of 10. With 196 concurrent players in the last 24 hours, the game currently holds the #6 spot among the most played tower defense games.
8.9
26,414
2,682
196
players
7. Infinitode 2 - Infinite Tower Defense
Infinitode 2 - a strategy in the Tower Defense genre, in which the player will have to build towers to protect his base from endless waves of enemies. The game features huge maps, lots of towers, resource miners, upgrade tree and map editor. Infinitode 2 - Infinite Tower Defense is a game developed and published by . Released on May 06th 2021 has received 3,674 reviews of which 3,354 were positive and 320 were negative resulting in a rating of 8.8 out of 10. With 175 concurrent players in the last 24 hours, the game currently holds the #7 spot among the most played tower defense games.
8.8
3,354
320
175
players
8. Ninja Kiwi Archive
Enjoy some of the best loved Flash games of the past in this awesome time capsule of over 60 Ninja Kiwi classics. Experience a piece of history and play the original Flash games that spawned the worldwide phenomenon of Bloons TD. Ninja Kiwi Archive is a game developed and published by . Released on July 08th 2020 has received 5,439 reviews of which 5,107 were positive and 332 were negative resulting in an impressive rating of 9.1 out of 10. With 155 concurrent players in the last 24 hours, the game currently holds the #8 spot among the most played tower defense games.
9.1
5,107
332
155
players
9. Bloons Adventure Time TD
Defend Ooo from the Bloon invasion in this epic tower defense crossover. Bloons Adventure Time TD is a game developed and published by . Released on January 16th 2019 has received 4,302 reviews of which 3,743 were positive and 559 were negative resulting in a rating of 8.4 out of 10. The game currently holds the #9 spot among the most played tower defense games.
8.4
3,743
559
89
players
10. Grow Defense
Upgrade your Castle and Unlock new tiers of Skills and Weapons to Defend vs Monsters and Bosses across VARIOUS ZONES! Find Rare ITEMS dropped from monsters and bosses and upgrade them to their full potential! Defeat RAID Mega-Bosses to find LEGENDARY items! Grow Defense is a game developed and published by . Released on January 10th 2021 has received 578 reviews of which 447 were positive and 131 were negative resulting in a rating of 7.3 out of 10. The game currently holds the #10 spot among the most played tower defense games.
7.3
447
131
73
players
More Tower Defense & Related Games
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