60%Good matchSwarm Grinder
78%1k78% positive reviews, Mostly Positive across 1k reviews·Roguelike · Roguelite
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Become a swarm. Think as one. Mutate. Multiply. Overwhelm. A roguelite auto-shooter built around hive-mind powers — craft broken builds, survive the chaos, crush enemies with sheer collective force! All to a thumping trance-techno soundtrack and neon-glow visuals.
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GREX
SteamAbout GREX
SWARM SURVIVORS
In GREX, you don’t play a hero — you command a living swarm.
Hundreds of Grexlings move, fight, and sacrifice themselves as one organism.
You do things no single character could ever pull off.
CONTROL THE UNCONTROLLABLE
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Swarm AI Combat – Your Grexlings dodge, chase, collide, and intercept automatically.
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Body as Weapon – Ram enemies, surround them, shred them, overwhelm them.
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Mass Sacrifice & Rebirth – Lose dozens, rebuild instantly, and come back stronger.
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Shape-Shifting – Use different shapes and formations to survive.
CRAFT YOUR PERFECT SWARM
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Genes – Combine gene types to create unique Grexling behaviors.
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Merging – Fuse genes into higher tiers for absurd power jumps.
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Passive Items – Heavy bonuses with real trade-offs.
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Upgrades – Level up, boost stats, and evolve your swarm’s instinct.
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Digging – Tear through the arena floor to find healing and diamonds.
ROGUELITE PROGRESSION
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Unlock permanent skill tree upgrades.
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Return stronger.
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Break the game on purpose.
DISCOVER. MUTATE. REPEAT.
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New swarm species that changes playstyle.
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Rare items and exotic genes.
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Endless builds that change how your entire organism behaves.
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(WIP — more on the way.)
FINAL CHALLENGE: "Vanilla Mode"
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Reset Skill Tree & upgrades.
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Start from zero.
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Defeat the final boss in pure vanilla chaos.
MUSIC, POWER, VFX
GREX is powered by a thumping trance-techno soundtrack and glowy neon VFX — swirling trails, pulsing lights, and particle storms that turn your swarm into a cosmic supernova.
GREX blends bullet-heaven chaos with deep buildcraft - but the star is your swarm. Learn it. Shape it. Weaponize it.
Can you control the chaos you create?
Have fun Swarming, Mike
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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