Gear Defense: Zombie TD Merge

CTT Production

In-app purchases

About this game

Gear Defense is a merge tower defense game where your weapons are powered by gears. Place gears on the battlefield, connect them to spin up weapons, and merge them into devastating firepower. Survive endless zombie waves in this free offline TD shooter.

⚙️ YOUR GEARS ARE YOUR WEAPONS
Drop gears onto the grid. When gears connect, weapons activate — miniguns, flamethrowers, rocket launchers, snipers, shockwave blasters. Merge matching gears to evolve weapons into stronger versions. Between waves, rearrange your gear layout to build the perfect defense.

🧟 ENDLESS ZOMBIE WAVES
Hordes of zombies, mutants, and bosses crash into your defense wave after wave. Each round escalates — tougher enemies, faster rushes, surprise attacks. Earn coins, collect loot bags, and spend them on upgrades that keep you alive longer.

🔫 SATISFYING BULLET HELL ACTION
Watch your gears spin and weapons unleash chaos. Bullets, flames, and rockets fill the screen in satisfying ASMR-style combat. The deeper you survive, the more intense it gets.

🛡️ UPGRADE YOUR ARSENAL
Power up weapons and warrior skills between rounds. Unlock RPG-style abilities, collect loot, and strengthen your gear machine. Every upgrade pushes your survival further.

WHY GEAR DEFENSE?
— The only merge TD where gears power your weapons
— Free offline — play without WiFi anywhere
— Endless zombie survival with boss fights
— Merge + tower defense + bullet hell in one game
— RPG upgrades, loot, and skill progression
— Active strategy — rearrange your defense every wave

Place gears. Merge weapons. Survive zombies. Download Gear Defense free.

Ratings and reviews

the game is fun but once you start getting to the point where you're getting the higher multipliers like +8 and + 16 the game just starts chugging to the point of almost being unplayable, even if you try to do the bare minimum with 1 weapon with a decently high multiplier it'll eventually load in so many bullets that nothing starts moving, the tube will just stop taking in stuff, it'll just pile up, and since you're not attacking you'll just be forced to lose. it's fun but very poorly optimized.

this game is really fun and there are no ads which is awesome. that being said it's not a finished game. any time you get a three star weapon it drops to about 1 frame a minute. also there's only 10 or so levels right now. the 11th was a blue screen for me with mobs marching across it. and the 12th level didn't work at all. if this game gets updated it would be a 5 star so hopefully it gets an update soon

Quite like this one, a lot better than most of the gear games I've played. Edit Level 25 12/12 is now broken no enemies spawning after killing the first few. Edit You expect me to email you to tell you what I have already said? No tell your team what I said about level 25 and from other reviews, seems it's not the only bugged level.

What’s new

Fixed bugs