59%Good matchAnts Took My Eyeball
93%22593% positive reviews, Very Positive across 225 reviews·Pixel Graphics · Loot
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Formic Fortress is a local co-op tower defense party game with rogue-like elements. Scavenge and throw blocks to build your anthill and fend off waves of nasty bugs! Protect your queen, survive the swarm, and unleash the dormant strength of your ammo through powerful upgrades resetting every run.
Formic Fortress
SteamYou're an ant with a very demanding queen, and you will protect her at all costs!
In Formic Fortress, prepare to face a relentless assault of insects coming to get your queen. Start fresh on every run. Seal the entrances with blocks, or hurl anything you can find at these nasty buggers. Survive the waves, grab shiny power-ups, and team up with friends in local co-op to bolster your numbers and ensure your colony's survival... or prepare to get scolded by Her Majesty!
Hand that second controller to your friend and have them join the fight against those pesky bugs, or make use of Steam Remote Play Together and keep your couch to yourself. With up to 4 players in local co-op, your enemies don't stand a chance!

Wield building blocks as weapons! Will you add that leaf to the hill, fortifying the entrance to the queen, or will you throw it at your enemies? The choice is yours, but you better make it fast!

Choose from a variety of unique power-ups after every wave to customize your playstyle for the run. Will the microplastics in your soda cap poison your foes, or are you more the leaf shuriken type? You decide. With every run, create a fresh new build that will have these harassing bugs shaking in their... bug boots.

Experience the trials of nature through a full day/night cycle and 4 distinct seasons. Fight while the sun is up and prepare for the next wave under the moonlight. Each season brings unique environmental challenges and types of blocks to master.

Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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The best games like Formic Fortress are Ants Took My Eyeball, Mycopunk, Empires of the Undergrowth, Empire of the Ants, and Bee Island.
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