Zombie Panic! Source: online co-op

Zombies · Action · Horror

Dive into the zombie apocalypse with Zombie Panic! Source: a cooperative, survival-horror first-person-shooter. A fast-paced standalone modification.

Who can play

SteamPrice on SteamPlay free

Free to play

84%

Very positive on Steam

“The thrill of fending off a zombie hoard who are being controlled by real people is great!”
ModDB
“Zombie Panic! Source is a truly one-of-a-kind experience for survival FPS lovers.”
Unigamesity
“If you love a fast paced, first-person zombie shooter, this is your game. The positives of this game far outweighs any improvement areas that could be identified.”
Zombie Gaming

From its Steam store page, where the publisher chooses the quotes.

Steam Deck Playable

Steam lists online co-op for PC. Free to play. Player counts are not confirmed yet. 84% positive of 7,900 Steam reviews.

Play modes here come from the Steam store listing, which does not give player counts. How we check facts

Updated October 27, 2026

Does Zombie Panic! Source have couch co-op?: No same-screen play is confirmed. The Steam listing does not include it on PC. Online play is the way to play it together.
Do you need two copies of Zombie Panic! Source?: No. It's free to play.; One of 1,371 co-op games where one copy is enough
What platforms is Zombie Panic! Source on?: PC.; One of 3,994 co-op games
Does Zombie Panic! Source work on Steam Deck?: Yes, with some extra steps: Steam rates it Playable for Steam Deck.
Is Zombie Panic! Source free?: Yes, it's free to play.

Left 4 Dead 2
2·8
PC
Xbox
Split-screen for 2, online for 8. On PC and Xbox. Overwhelmingly positive: 97% of 820,000 Steam reviews.
Left 4 Dead
8
PC
Online for 8. On PC. Overwhelmingly positive: 96% of 59,000 Steam reviews.
Masked Forces: Zombie Survival
2+
PC
Online for 2+. On PC. Mostly positive: 70% of 360 Steam reviews.
Call of Duty: Black Ops III
4·18
PC
PS5
+1
Split-screen for 4, online for 18. On PC, PS5 and Xbox. Very positive: 88% of 160,000 Steam reviews.
Call of Duty: World at War
2·32
PC
Xbox
Split-screen for 2, online for 32. On PC and Xbox. Very positive: 92% of 46,000 Steam reviews.
No More Room in Hell
8
PC
Free to play
Online for 8. On PC. Free to play. Very positive: 89% of 77,000 Steam reviews.
Call of Duty: Black Ops
4·18
PC
PS5
+1
Split-screen for 4, online for 18. On PC, PS5 and Xbox. Very positive: 91% of 22,000 Steam reviews.
Back 4 Blood
8
PC
PS5
+1
Online for 8. On PC, PS5 and Xbox. Mixed: 69% of 55,000 Steam reviews.
White Noise 2
2+
PC
Xbox, not confirmed
Online for 2+. On PC and Xbox. Very positive: 80% of 2,200 Steam reviews.
Call of Duty: Vanguard
2+
PC
+2
Online for 2+. On PC, PS5 and Xbox. Mixed: 67% of 4,200 Steam reviews.
Call of Duty: Black Ops 7
Call of Duty: Black Ops 7
2+
PC
+2
Online for 2+. On PC, PS5 and Xbox. Mostly negative: 37% of 4,500 Steam reviews.
BrainBread 2
2+·2+
PC
Free to play
Online for 2+, same room for 2+. On PC. Free to play. Mostly positive: 73% of 5,200 Steam reviews.