- Games
- Killing Floor
Killing Floor
A co-op horror shooter where up to six players hold out against waves of monsters from failed experiments.
Online co-op for up to 6 players. Crossplay only between PC systems.
- 6 online
Where to buy
Playing together
- Online co-op6 players
- Local co-opNot confirmed
- YesOnly between PC systemsFriends on different platforms, such as PC and PlayStation, can play together.
- Not confirmedA friend can join or leave while you are already playing, without starting over.
- Not confirmedFriends play free with a Friend's Pass or similar.
- Steam DeckPlayableValve's own rating
About the game
Military experiments on clones have gone badly wrong across England, and your team is sent in to clear out the monsters. Up to six of you fight off wave after wave of them in cities and countryside. When a wave ends, a trader opens a shop and you have about a minute to reach it.
Before a match you pick a perk, which works like a class. Field medics heal better, support specialists carry more weapons, and sharpshooters do extra damage with headshots. Kills earn cash for better guns and armor, and you can pass cash to a teammate. Doors can be welded shut to steer the horde, and your perk levels carry over to the next match.
It is dark and gory with a silly streak. A match ends with a boss, and the top difficulty levels are very hard. It suits a group that likes picking roles and working as a team.
How it feels
Kind of game
A team takes on missions or runs full of enemies. You pick gear, cover each other and pick each other up.
- At its heart
- Now and then
- Laughter and chaos
- Calm and coziness
- Time to hang out
- Sessions
- Repeatable runs
- About
- Monsters
Rated on our own feel scale. 4 sources back these ratings.
Screenshots
From the Steam store page. Open one to see it full size.
If you liked Killing Floor
You will probably enjoy these too. Each one says why.
Killing Floor 2
Why it scores 92%
What they share
- Kind of game
- Squad shooter
- About
- Monsters
- Notable in both
- Fear, Working in sync, Tension and danger, Planning ahead, Getting better, Unlocks and progress
- Core to both
- Fighting
- Sessions
- Repeatable runs
- Co-op
- Online co-op for up to 6 players
- 6 online
Both send your squad into fights where you watch each other's backs. Both are about monsters that hunt you. Both are often scary.
No big difference from Killing Floor.
Killing Floor 3
Why it scores 89%
What they share
- Kind of game
- Squad shooter
- About
- Monsters
- Notable in both
- Fear, Working in sync, Tension and danger, Planning ahead, Getting better, Unlocks and progress
- Core to both
- Fighting
- Sessions
- Repeatable runs
- Co-op
- Online co-op for up to 6 players
- 6 online
- Crossplay
Both send your squad into fights where you watch each other's backs. Both have a lot of fighting side by side. Both are about monsters that hunt you.
No big difference from Killing Floor.
Crab Champions
Why it scores 86%
What they share
- Kind of game
- Squad shooter
- About
- Monsters
- Core to both
- Fighting
- Sessions
- Repeatable runs
- Notable in both
- Tension and danger, Planning ahead, Getting better
- Co-op
- Online co-op for up to 6 players
How Crab Champions differs
- Less scary than Killing Floor
- More jumping and climbing than Killing Floor
- A roguelike, so every run starts over
- Early access
- 6 online
Both send your squad into fights where you watch each other's backs. Both play in runs or missions you repeat. Both are about monsters that hunt you.
But less scary than Killing Floor.
All co-op facts
Last checked 28 October 2026. The small numbers link to the page that states each fact.
Co-op
- Fewest players online
- Not confirmed
- Local co-op
- Not confirmed
- Most players on one screen
- Not confirmed
- Split or shared screen
- Not confirmed
- Separate-device co-op
- Not confirmed
- Most players on separate devices
- Not confirmed
- Free base co-op
- No
The checked computer base game has a paid access model at 19.99 US dollars before sales. Demos, trials, free weekends, guest passes, platform sharing and temporary grants do not establish ongoing free base co-op.
- 2
- Confirmed free setups
- Does not apply
- Friends can join mid-game
- Not confirmed
- Only one of you needs to buy it
- Not confirmed
- Voice chat by distance
- Not confirmed
Sources
8 pages
store.steampowered.comStore page, read 28 October 2026
Backs Online co-op, Most players online, Crossplay, Release date, Platforms, Genres, Kind of game, Sessions, About, Fear, Laughter and chaos, Fighting, Working in sync, Planning ahead, Unlocks and progress.
- Online co-op: Publisher text describes cooperative play for up to six players against waves. Steam lists the Co-op category.
- Most players online: The feature list gives cooperative play for up to six players against multiple waves.
- Crossplay: Steam lists the Cross-Platform Multiplayer category. A badge alone does not prove co-op crossplay, so Valve's 2010 post is the main source.
- Release date: The page shows 14 May 2009.
- Platforms: Steam shows Windows, Mac and Linux tabs. The Mac tab carries Steam's notice that from 2024-02-15 the client no longer supports 32-bit games or macOS 10.14 or lower. The build asks for OS X 10.5.8 or later on an Intel Mac, so it may not run on a current Mac.
- Genres: The maker calls it a co-op survival horror FPS.
- Kind of game: A squad of up to six picks perks that balance out the co-op team.
- Sessions: Matches are runs of monster waves, and perks carry over between matches.
- About: Cloning experiments for the military have gone wrong and left England full of monsters.
- Fear: The maker calls it survival horror and user tags include Horror and Survival Horror.
- Laughter and chaos: User tags include Dark Comedy.
- Fighting: User tags include FPS and Shooter, and the page lists 33+ weapons.
- Working in sync: Text says to choose perks that balance the team and to equip it with welders and medical tools.
- Planning ahead: Text covers perk choice, welding doors to steer the horde and configurable waves and difficulty.
- Unlocks and progress: Persistent perks turn in-game achievements into permanent improvements.
store.steampowered.comStore data, read 28 October 2026
Backs Steam app ID, Release status, Platforms, Free base co-op.
- Steam app ID: The response identifies app 1250 as Killing Floor.
- Release status: Steam lists the game as released.
- Platforms: Steam lists Windows, Mac and Linux builds.
- Free base co-op: The checked computer base game has a paid access model at 19.99 US dollars before sales. Demos, trials, free weekends, guest passes, platform sharing and temporary grants do not establish ongoing free base co-op.
store.steampowered.comStore data, read 28 October 2026
Backs Steam Deck.
- Steam Deck: Valve rates the game Playable on Steam Deck.
wikidata.orgWikidata, read 28 October 2026
Backs Wikidata item, Genres, Release date, Platforms.
- Genres: P136 is first-person shooter, survival horror and horde shooter.
- Release date: P577 is 2009-05-14.
- Platforms: P400 is Windows, macOS and Linux.
store.steampowered.comOfficial news, read 28 October 2026
Backs Crossplay, Crossplay between.
- Crossplay: Valve's post of 2010-05-19 names Killing Floor among the first co-op games with PC versus Mac play, and quotes Tripwire's president on the native Mac version.
- Crossplay between: The post names PC and Mac only. It does not name Linux, so Linux is left out.
gamespace.comPress, read 28 October 2026
Backs Release date, Genres, Fear.
- Release date: Tripwire's anniversary text, published 2019-05-15, says the game launched on 14 May 2009 for PC on Steam.
- Genres: Tripwire calls the series a horror-based first-person co-op shooter.
- Fear: Tripwire calls the series horror-based.
ign.comPress, read 28 October 2026
Backs Most players online, Sessions, About, Tension and danger, Calm and coziness, Working in sync, Fighting, Time to hang out, Unlocks and progress, Planning ahead.
- Most players online: Review of 2009-05-20 describes one of up to six survivors.
- Sessions: Matches have four length options and end with a boss after the last round.
- About: Review says the creatures are specimens cloned by a biotech firm, not the undead.
- Tension and danger: Describes hordes hitting the team in intensifying waves.
- Calm and coziness: Says there is about a minute between rounds to find the trader.
- Working in sync: Perks work like classes, such as field medics who heal better and support specialists who carry more.
- Fighting: Describes waves of creatures and a shooter loadout of guns and grenades.
- Time to hang out: Between rounds teammates can pass cash to each other. Talk stays on the task.
- Unlocks and progress: Perks run from level 0 to 5 and are earned by meeting targets such as damage dealt.
- Planning ahead: A weight limit forces gear choices, and welding doors funnels enemies.
eurogamer.netPress, read 28 October 2026
Backs Most players online, Working in sync, Tension and danger, Laughter and chaos, Getting better, Unlocks and progress.
- Most players online: Review of 2009-05-28 describes you and up to five others fending off waves.
- Working in sync: Healing from a teammate heals more than self-healing, which prompts teamwork.
- Tension and danger: Says the highest difficulty levels are genuinely nightmarish.
- Laughter and chaos: Calls the game faintly silly.
- Getting better: The top difficulty levels are described as nightmarish, so skill counts.
- Unlocks and progress: Notes a tangible sense of advancement through five levels of six perks.