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 191–200 of 261 games matching War · updated 12 Oct 2026

Filters: War × Clear all
$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
75% of 16

A funny shooting game where you can customize the gameplay, such as zombies holding submachine guns and shooting aliens, or wolf dogs holding samurai swords and fighting special forces in close combat... How unexpected the settings will be depends on your imagination.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Not stated
Reviews
85% of 27

Created by a single developer with a passion for video games, Vanity immerses you in a world of frenetic action, whether in PvP or PvE, with over 10 maps, 9 game modes, over 10 weapons, abilities and ultimates. powerful.

$
Released
Price
$ · Cheap
Players
👥 Up to 2 players
Reviews
100% of 8

Try this small real time strategy and roguelike game where you need to defend your base against multiple waves . Each run you will have to choose between unique units and unique buffs.

$$
Released
Price
$$ · Standard
Players
👥 Up to 4 players
Reviews
58% of 70

UBOAT: The Silent Wolf is an amazing combination of a role-playing game and a simulator, offering a deep and immersive experience, allowing you to feel like a real submarine captain during World War II.

If you loved these, you'll love this

$
Released
Price
$ · Cheap
Players
👥 Not stated
Reviews
74% of 627

E.E.R.I.E 2 is a tactical shooting game. In the modern Gensokyo, play the role of fairy Luna, and uses a variety of modern light weapons and tactical equipment to join in a war that decides the fate of Gensokyo.

If you loved these, you'll love this

Free
Released
Price
Free
Players
👥 Up to 16 players
Reviews
76% of 68

‘Gemini: Binary Conflict’ is a multiplayer, class based, first person shooter set in the midst of an interplanetary war. The game features a colourful visual style, unconventional weaponry, equipment, armour, class roles and modes, to provide a subtle mix of familiar and unusual game mechanics.

If you loved these, you'll love this

$$$
Released
Price
$$$ · Expensive
Players
👥 Not stated
Reviews
85% of 486

The sparks of destiny ignite in this rich depiction of the Warring States period that features a total of 55 different officers. The deluxe edition contains more than 150 previously released DLC from "SAMURAI WARRIORS 4," including costumes, weapons, customization parts, scenarios, and BGM!

If you loved these, you'll love this

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

An action-packed FPS where you defend your trench against waves of attacking enemies by utilizing a large selection of modern (and not so modern) military weapons, features both single-player and two player online multiplayer (peer-to-peer).

If you loved these, you'll love this