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A maze-building tower defense against hordes of thousands. Raise walls, build 15 kinds of defenses, pick a card every wave and unlock a 562-upgrade skill tree. Slow-motion missiles, a boss every wave and endless waves: how far can you go?
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Match strength key:80+65+50+<50Horde Lab
SteamAbout Horde Lab
Build the maze. Annihilate the horde.
Horde Lab is a tower defense where YOU decide the path. Place walls anywhere and the horde will always look for an open route: stretch it out, drag it under your towers' fire and watch thousands of enemies crash against your maze.

Thousands of enemies at once
Rivers of enemies, knockback, chain explosions, lightning, fire and vortexes. And when a missile lands on the thickest part of the horde... time stands still.


3 vs 3 online
Team up with two friends (or fill the seats with bots) and take on three other players online through Steam. Everyone raises a base, sends troops that level up and unleashes bosses with abilities. Coordinate purges, cover your allies and tear down the rival bases. With lobbies, team and all chat, and a wins leaderboard.

Every run is different
A 562-upgrade skill tree
Every run earns points for the skill tree: unlock towers, upgrade them and pick unique special abilities. The more you play, the further you get.

Features
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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