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Is Call of Duty®: Modern Warfare® 3 (2011) (Steam app 42680) multiplayer or co-op?

Yes — co-op. Call of Duty®: Modern Warfare® 3 (2011) is a military shooter game released in 2011, 85% positive on Steam (25,006 reviews), with 357 playing right now. $15.99 on Steam.

Co-opSingle-player tooShooter · Military shooter

The best-selling first-person action series of all-time returns with an epic sequel to the multiple GOTY award winner Call of Duty®: Modern Warfare® 2

How Call of Duty®: Modern Warfare® 3 (2011) plays with friends, according to Steam

Online co-op
Not listed on Steam
Local / split-screen co-op
Not listed on Steam
Online PvP
Not listed on Steam
LAN play
Not listed on Steam
Single-player mode
Yes

Steam's own category list for the game, as of 2026-09-09. "Not listed" means the store page does not claim that mode; community mods or Remote Play can still add it.

Steam tags: Action, FPS, Multiplayer, Shooter, First-Person, War, Singleplayer, Online Co-Op

Do you and a friend both own Call of Duty®: Modern Warfare® 3 (2011)?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Call of Duty®: Modern Warfare® 3 (2011) is one of them — then helps you pick tonight's game with a weighted roll or a bracket.

Do you and a friend both own Call of Duty®: Modern Warfare® 3 (2011)?Free, no login — uses public Steam profiles.

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Tired of Call of Duty®: Modern Warfare® 3 (2011)? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is Call of Duty®: Modern Warfare® 3 (2011) co-op?
Yes, Call of Duty®: Modern Warfare® 3 (2011) supports co-op.
Does Call of Duty®: Modern Warfare® 3 (2011) have PvP?
Steam does not list PvP for Call of Duty®: Modern Warfare® 3 (2011).
Do we both need to own Call of Duty®: Modern Warfare® 3 (2011) to play together?
Yes. Call of Duty®: Modern Warfare® 3 (2011) is played online, so each player needs their own copy on their own Steam account (or PC Game Pass where it is offered). Steam Families can share a library, but two people cannot play the same shared game at the same time.
How many people play Call of Duty®: Modern Warfare® 3 (2011)?
About 357 players were in-game when this page's data was last refreshed (2026-09-09).

Ready Up is a free tool: enter two Steam usernames and it lists the multiplayer games you both own, runs a bracket to pick one, and suggests new co-op games that fit how you both play. Ratings, tags and player counts from Steam and SteamSpy; page updated 2026-09-23. Powered by Steam — not affiliated with or endorsed by Valve Corporation or Microsoft. Ready Up is a Somebody Decide program. How the data works · Legal & privacy · All types · Game Pass