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Is DOOM 3 (2007) multiplayer or co-op?

Yes — online multiplayer. DOOM 3 is a sci-fi shooter game released in 2007, 89% positive on Steam (7,827 reviews), with 49 playing right now. price varies on Steam.

Online multiplayerSingle-player tooShooter · Sci-fi shooter

How to play DOOM 3 with a friend: OpenCoop

Four-player co-op through Doom 3, Resurrection of Evil and 42 custom maps. Old, but it still works. The game is multiplayer on its own; this is the community layer people use on top of it.

Players
2–4
Modes
co-op
Status
Old build only — no recent releases or needs an older game version — check before you plan a night around it
You need
Doom 3 (2004) from Steam; ModDB download
Price
Free

Get OpenCoop All 77 games with multiplayer mods →

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How DOOM 3 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: Horror, Action, FPS, Sci-fi, Dark, First-Person, Gore, Singleplayer

Do you and a friend both own DOOM 3?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether DOOM 3 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 DOOM 3?Free, no login — uses public Steam profiles.

Or open the Steam store page.

Games like DOOM 3 you can play together

STAR WARS™ Battlefront™ II
Sci-fi shooter · 88% positive on Steam (71,208 reviews) · 9,213 playing right now
Halo: The Master Chief Collection
Sci-fi shooter · 92% positive on Steam (242,067 reviews) · 3,362 playing right now
Halo Infinite
Sci-fi shooter · 70% positive on Steam (177,041 reviews) · 2,275 playing right now
Half-Life 2
Sci-fi shooter · 98% positive on Steam (245,627 reviews) · 1,555 playing right now
Black Mesa
Sci-fi shooter · 95% positive on Steam (127,693 reviews) · 907 playing right now
Half-Life
Sci-fi shooter · 97% positive on Steam (148,221 reviews) · 634 playing right now

Tired of DOOM 3? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is DOOM 3 co-op?
DOOM 3 does not list co-op on Steam; it has Online multiplayer, Single-player too.
Does DOOM 3 have PvP?
Steam does not list PvP for DOOM 3.
Do we both need to own DOOM 3 to play together?
Yes. DOOM 3 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 DOOM 3?
About 49 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