Online co-op Alternate History games

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

Showing 31–40 of 78 games matching Alternate History · updated 12 Oct 2026

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$$
Released
Price
$$ · Standard
Players
👥 Not stated
Reviews
84% of 485

An approachable turn-based grand strategy sandbox. Lead a nation, forge alliances, wage wars and rewrite history. Play solo or with friends, create your own maps and scenarios, and explore community mods on Steam Workshop.

$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
100% of 22

Sheep Seeker is a fast-paced, 3D platformer where you race through dynamic levels to catch every sheep as fast as possible with a friend or solo. Unlock unique abilities to Run, Jump, Explode, and Warp to compete for the top spot on the global Sheep Seeker leaderboard!

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
66% of 3

A co-op submarine piloting horror game with asymmetrical elements where your survival is dependent on the effectiveness of communication between your crew and the efficient management of resources left behind by the old world.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
57% of 14

点燃你的战魂,投身乱世掀起惊天风暴!化身铁血诸侯,号令三国名将,统领无敌雄师,在真实还原的三国版图上纵横沙场,血战四方!

Free
Released
Price
Free
Players
👥 Not stated
Reviews
70% of 182

Treasure Hunters: Prologue is a free version of 'Treasure Hunters', an intense, co-op treasure-hunting game set in mysterious dungeons filled with puzzles, platforms, and deadly creatures, where your goal is to find and steal the most valuable treasures

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$
Released
Price
$ · Cheap
Players
👥 1–4 players
Reviews
87% of 786

C.A.S.T is a third-person PvE extraction shooter playable solo or in co-op. Select your character and loadout to battle enemy hordes, evade anomalies, and complete objectives across handcrafted maps with dynamic procedural elements.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
29% of 27

Welcome to a global multiplayer meat grinder. This is a strategy game where you don’t just win — you collectively erase countries from a single, shared world map. Only one nation is allowed to survive!

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$
Released
Price
$ · Cheap
Players
👥 Up to 5 players
Reviews
69% of 732

In iDigging, you’ll balance treasure hunting, home improvement, and the strategy of hiding from curious neighbors and authorities. Upgrade, dig, and create your best life despite all the challenges!

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$
Released
Price
$ · Cheap
Players
👥 Up to 4 players
Reviews
100% of 1

Hitler won the war by splicing animal DNA with humans: The Binary Super Soldier. You are the very first Binary Elite, designed to usher his reign to the end of time. But will you? HELL no. Camp Z is an alternate history 2D side-scrolling run-and-gun shooter with online co-op.

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Free
Released
Price
Free
Players
👥 Not stated
Reviews
81% of 70

A love letter to old-school browser-based RTS MMOs – with charming nostalgic pixel graphics, a dash of political satire, and tonnes of strategic tension. Build your empire, face off against other players, and take what’s yours in true British imperial style: by dominating the map.

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