Online co-op War games

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

Showing 121–130 of 261 games matching War · updated 12 Oct 2026

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$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 2

Start your world conquest with any faction you choose. Build and upgrade your production buildings. Plan and decide the composition of your army. Create your own ability deck. Challenge legendary boss to a fight. Embark on an immersive story campaign. Play with your friends.

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
100% of 3

SHARP FISTS is an action game that allows players to freely switch weapons and attack modes during combat, using a variety of weapons and skills to perform combo attacks. The highly mobile combat system provides players with a fluid combat experience.

Free
Released
Price
Free
Players
👥 Not stated
Reviews
68% of 45

东汉末年,天下动荡,群雄并起,在这片风云变幻的乱世中,你将化身一方霸主,自偏安一隅的孤城出发,广揽贤才、经营城政、整军备战、攻城略地。是匡扶汉室,重振中兴?还是割据一方,自立为王?亦或是问鼎中原,君临天下?你的每一次抉择皆可改写这段波澜壮阔的乱世史诗!

Free
Released
Price
Free
Players
👥 Up to 10 players
Reviews
87% of 239

Granvir: Zero Front is a 3rd person action roguelite mech-builder with co-op multiplayer. Experience the prelude to Granvir as the resistance response to the Millennium Company invasion. Pilot your Granvir, manage your campaign between battles to find the best equipment, and stay in the fight.

If you loved these, you'll love this

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!

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
91% of 12

In Ascendant Realms you lead a nation in a struggle for glory. Cozy setting meets tactical thinking from classic turn based strategies, but twists it with compact gameplay. Develop your city, research new technologies, fight other leaders - or just create your own story in the sandbox.

$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
70% of 862

Tank Squad is a tactical-combat action game. Take part in big tank battles during World War II. Play single-player or coop (4 players). Repair your tanks, replenish supplies, manage the crew and get back to the action!

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
50% of 8

Immerse yourself in the electrifying world of Caribbean sound clash culture with SoundKilla. In this dynamic multiplayer experience, you and your crew will battle for sonic supremacy in the ultimate test of rhythm, strategy, and style.

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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.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
66% of 54

PlanetX is a real-time strategy MMO set on a spherical planet. Players expand territories, construct buildings, and manage resources to develop their empire. The ultimate goal is to conquer the entire planet by claiming all land plots and outpacing rivals in strategic growth and domination.