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.

How many people play DOOM 3?

About 49 players were in-game when this page was built (2026-09-08).

Ready Up — what game do we play?Compare two Steam libraries →

Multiplayer games › Shooter › Sci-fi shooter

Is DOOM 3 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

A massive demonic invasion has overwhelmed the Union Aerospace Corporation's (UAC) Mars Research Facility, leaving only chaos and horror in its wake. As one of…

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.

Compare our libraries Steam store page

Games like DOOM 3 you can play together

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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.
How many people play DOOM 3?: About 49 players were in-game when this page was built (2026-09-08).

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; updated 2026-09-08. Powered by Steam — not affiliated with or endorsed by Valve Corporation.