Online co-op Gun Customization games

Every online co-op Gun Customization game on Steam we know of, newest first. Add tags or a price band to narrow it down.

Showing 1–10 of 102 games matching Gun Customization Β· updated 12 Oct 2026

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$
Released
Price
$ Β· Cheap
Players
πŸ‘₯ Up to 4 players
Reviews
100% of 2

A fast-paced co-op action game where you customize your build, survive relentless hordes, and conquer brutal challenges for higher scores and bragging rights.

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$$
Released
Price
$$ Β· Standard
Players
πŸ‘₯ Not stated
Reviews
90% of 31

Obscurity: Unknown Threat is a horror shooter game where a team of soldiers must survive against a hidden foe. The game contains both conventional symmetrical FPS game modes as well as asymmetrical battles vs the Obscurity.

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$
Released
Price
$ Β· Cheap
Players
πŸ‘₯ 1–4 players
Reviews
0% of 2

ResistanceZ is a challenging cooperative survival and action game based around enemy waves, playable with 1–4 players, that requires teamwork to fight hordes of zombies and mutants. Team up with your friends, face waves of enemies, and survive!

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$
Released
Price
$ Β· Cheap
Players
πŸ‘₯ Up to 6 players

Duelgrounds is a fast-paced 1v1 FPS where every round brings a new weapon and every decision matters. Master the entire arsenal, manage limited resources, and outplay your opponents through skill, strategy, and adaptation.

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Free
Released
Price
Free
Players
πŸ‘₯ Not stated
Reviews
85% of 14

Squad up, gear up, and blow up the scoreboard. Mags and Body Bags delivers a free-to-play, multi-mode FPS with deep customization and zero pay-to-win, for players on mouse and keyboard or controller.

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$$
Released
Price
$$ Β· Standard
Players
πŸ‘₯ 2–8 players
Reviews
100% of 4

Tower defense on rails. Wake the last war-train in a steampunk world that needs you: build your armored consist car by car, bristle it with turrets, and harvest fuel on the move as you hold the line across a vibrant frontier. Capture towns, upgrade your train, and follow a lone survivor onward.

Free
Released
Price
Free
Players
πŸ‘₯ Not stated
Reviews
59% of 217

The Corrupted is a high-octane sci-fi PVE shooter defined by satisfying progression and intense boss encounters. Plunge into battlefields consumed by the Anomaly, fighting through relentless swarms, elite hunters, and colossal bosses.

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$$
Released
Price
$$ Β· Standard
Players
πŸ‘₯ Not stated
Reviews
83% of 829

Dagger Directive is a tactical FPS that allows you to approach each mission in your own way. Select equipment, decide the time of day, then move methodically to complete your mission. Enjoy the modern mechanics and old school graphics as you fight across a variety of missions and environments.

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$
Released
Price
$ Β· Cheap
Players
πŸ‘₯ Not stated
Reviews
0% of 2

Survive in the dashing nineties, where Slavic mythology became real. Explore Kerch and its semi-abandoned surroundings, explore dangerous anomalies, fight against mythological evil spirits and bandits, help the locals and unravel the mystical secrets of a forgotten world.

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$$
Released
Price
$$ Β· Standard
Players
πŸ‘₯ Not stated
Reviews
72% of 140

A fast-paced classic military FPS inspired by old-school online shooters. Battle in online PvP or PvE against intelligent AI bots. Unlock soldiers, weapons, perks, and attachments, earn XP, customize your loadouts, and enjoy full matches with no empty servers.

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