Is Half-Life 2 co-op?

Not natively. Half-Life 2 ships single-player; the community mod Synergy adds co-op — Half-Life 2, Episode One and Episode Two in co-op with balanced enemy spawns.

Does Half-Life 2 have PvP?

Only with the Synergy mod, which is co-op only.

Do we both need to own Half-Life 2 to play together?

Not always. Half-Life 2 supports Steam Remote Play Together: one person who owns it hosts and streams a local session to friends who don't (Steam quotes up to four players, more on a fast connection). For online co-op or PvP, every player needs their own copy.

How many people play Half-Life 2?

About 1,555 players were in-game when this page's data was last refreshed (2026-09-09).

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

Multiplayer games › Shooter › Sci-fi shooter

Is Half-Life 2 multiplayer? Yes — with Synergy

Not out of the box — but the Synergy mod makes it co-op. Half-Life 2 is a sci-fi shooter game released in 2004, 98% positive on Steam (245,627 reviews), with 1,555 playing right now. $9.99 on Steam.

Co-opSingle-player tooMultiplayer via mod: SynergyShooter · Sci-fi shooter

How to play Half-Life 2 with a friend: Synergy

Half-Life 2, Episode One and Episode Two in co-op with balanced enemy spawns. Steam lists Half-Life 2 as single-player, so it won't show up in Steam's own "games we both own" view as something you can play together — Ready Up counts it anyway, marked "Via mod", and you can hide mod-only games with one filter if that's not your thing.

Players: servers
Modes: co-op
Status: Maintained — works with the current game version and gets updates
You need: Free on Steam; needs Half-Life 2 (and the episodes for their campaigns)
Price: Free

Get Synergy All 77 games with multiplayer mods →

Reawakened from stasis in the occupied metropolis of City 17, Gordon Freeman is joined by Alyx Vance as he leads a desperate human resistance. Experience the…

How Half-Life 2 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
Remote Play Together (one copy, streamed to friends): Yes
Single-player mode: Yes
Controller: Full controller support
Mods: Steam Workshop

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: FPS, Action, Sci-fi, Classic, Singleplayer, Story Rich, Shooter, First-Person

Do you and a friend both own Half-Life 2?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Half-Life 2 is one of them — then helps you pick tonight's game with a weighted roll or a bracket.

Or open the Steam store page.

Games like Half-Life 2 you can play together

STAR WARS™ Battlefront™ II

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Halo: The Master Chief Collection

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Halo Infinite

Sci-fi shooter · 70% positive on Steam (177,041 reviews) · 2,275 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

STAR WARS™ Battlefront II (Classic, 2005)

Sci-fi shooter · 95% positive on Steam (53,287 reviews) · 323 playing right now

Tired of Half-Life 2? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is Half-Life 2 co-op?: Not natively. Half-Life 2 ships single-player; the community mod Synergy adds co-op — Half-Life 2, Episode One and Episode Two in co-op with balanced enemy spawns.
Does Half-Life 2 have PvP?: Only with the Synergy mod, which is co-op only.
Do we both need to own Half-Life 2 to play together?: Not always. Half-Life 2 supports Steam Remote Play Together: one person who owns it hosts and streams a local session to friends who don't (Steam quotes up to four players, more on a fast connection). For online co-op or PvP, every player needs their own copy.
How many people play Half-Life 2?: About 1,555 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