The Game Census
Killing Floor cover art

Killing Floor

Tripwire Interactive · 2009-05-14

Steam

Action

Modes: Single player, Multiplayer, Co-operative

Releases: Nov 2012 (Linux), May 14, 2009 (PC (Microsoft Windows)), May 19, 2010 (Mac)

6-player co-op survival horror at its finest! Free updates, free special events and a ridiculous amount of fun!

200
playing now
95%
positive of 69k reviews
Overwhelmingly Positive
steam rating
2,000,000–5,000,000
owners (SteamSpy est.)
68/100
critic score (5 outlets, IGDB)
73/100
IGDB user rating (164 ratings)
60h
to beat · rushed 35h
platinum
deck/linux tier (ProtonDB)
$19.99
steam price (US)

200 players in-game as of 2026-08-30 01:00 UTC (census sample)

Killing Floor is a cooperative first-person shooter video game developed and published by Tripwire Interactive. It was originally released as an Unreal Tournament 2004 mod in 2005. A full retail release followed on May 14, 2009, for Microsoft Windows, and for OS X on May 5, 2010. A version for Linux was released via Steam in November 2012.

Trailer

Killing Floor trailer thumbnail

The Killing Floor (1984) | Trailer | Damien Leake | Alfre Woodard | Dennis Farina

≈1,000,000 YouTube results for this game's trailer search

Health check

Healthy
  • · 200 players in-game at the last census sample.
  • · 925 reviews in the last 8 weeks (~116/week).
  • · Review velocity down 15% vs the prior 8 weeks.
  • · Top 3% of 10,791 Action games in the census by review count.

Health tier since 2026-08-29

Estimated sales: 2.8M–5.5M copies

Review-multiple estimate from 68,901 total reviews — how this is computed.

Current store prices

lowest across shops (ITAD)$16.04-20%

Deal snapshots via CheapShark, refreshed daily.

All-time low: $0.80 at GreenManGaming (2019-04-10) · bundled 20×via IsThereAnyDeal

12-month high $19.99 · on sale 62 of 82 observed days (census price snapshots)

Review momentum

PositiveNegative
28528520182026Week of 2018-01-01: 151 positiveWeek of 2018-01-01: 11 negativeWeek of 2018-02-01: 76 positiveWeek of 2018-02-01: 15 negativeWeek of 2018-03-01: 95 positiveWeek of 2018-03-01: 7 negativeWeek of 2018-04-01: 110 positiveWeek of 2018-04-01: 11 negativeWeek of 2018-05-01: 71 positiveWeek of 2018-05-01: 9 negativeWeek of 2018-06-01: 115 positiveWeek of 2018-06-01: 11 negativeWeek of 2018-07-01: 105 positiveWeek of 2018-07-01: 7 negativeWeek of 2018-08-01: 79 positiveWeek of 2018-08-01: 9 negativeWeek of 2018-09-01: 93 positiveWeek of 2018-09-01: 6 negativeWeek of 2018-10-01: 75 positiveWeek of 2018-10-01: 2 negativeWeek of 2018-11-01: 232 positiveWeek of 2018-11-01: 6 negativeWeek of 2018-12-01: 105 positiveWeek of 2018-12-01: 12 negativeWeek of 2019-01-01: 78 positiveWeek of 2019-01-01: 6 negativeWeek of 2019-02-01: 64 positiveWeek of 2019-02-01: 8 negativeWeek of 2019-03-01: 56 positiveWeek of 2019-03-01: 5 negativeWeek of 2019-04-01: 43 positiveWeek of 2019-04-01: 9 negativeWeek of 2019-05-01: 94 positiveWeek of 2019-05-01: 17 negativeWeek of 2019-06-01: 280 positiveWeek of 2019-06-01: 16 negativeWeek of 2019-07-01: 242 positiveWeek of 2019-07-01: 8 negativeWeek of 2019-08-01: 52 positiveWeek of 2019-08-01: 7 negativeWeek of 2019-09-01: 34 positiveWeek of 2019-09-01: 3 negativeWeek of 2019-10-01: 139 positiveWeek of 2019-10-01: 10 negativeWeek of 2019-11-01: 285 positiveWeek of 2019-11-01: 7 negativeWeek of 2019-12-01: 221 positiveWeek of 2019-12-01: 11 negativeWeek of 2020-01-01: 161 positiveWeek of 2020-01-01: 5 negativeWeek of 2020-02-01: 101 positiveWeek of 2020-02-01: 3 negativeWeek of 2020-03-01: 146 positiveWeek of 2020-03-01: 10 negativeWeek of 2020-04-01: 169 positiveWeek of 2020-04-01: 9 negativeWeek of 2020-05-01: 107 positiveWeek of 2020-05-01: 4 negativeWeek of 2020-06-01: 227 positiveWeek of 2020-06-01: 13 negativeWeek of 2020-07-01: 178 positiveWeek of 2020-07-01: 8 negativeWeek of 2020-08-01: 96 positiveWeek of 2020-08-01: 7 negativeWeek of 2020-09-01: 121 positiveWeek of 2020-09-01: 11 negativeWeek of 2020-10-01: 153 positiveWeek of 2020-10-01: 9 negativeWeek of 2020-11-01: 164 positiveWeek of 2020-11-01: 8 negativeWeek of 2020-12-01: 138 positiveWeek of 2020-12-01: 12 negativeWeek of 2021-01-01: 128 positiveWeek of 2021-01-01: 7 negativeWeek of 2021-02-01: 100 positiveWeek of 2021-02-01: 4 negativeWeek of 2021-03-01: 94 positiveWeek of 2021-03-01: 8 negativeWeek of 2021-04-01: 99 positiveWeek of 2021-04-01: 4 negativeWeek of 2021-05-01: 76 positiveWeek of 2021-05-01: 7 negativeWeek of 2021-06-01: 135 positiveWeek of 2021-06-01: 5 negativeWeek of 2021-07-01: 116 positiveWeek of 2021-07-01: 5 negativeWeek of 2021-08-01: 89 positiveWeek of 2021-08-01: 6 negativeWeek of 2021-09-01: 144 positiveWeek of 2021-09-01: 158 negativeWeek of 2021-10-01: 168 positiveWeek of 2021-10-01: 22 negativeWeek of 2021-11-01: 136 positiveWeek of 2021-11-01: 14 negativeWeek of 2021-12-01: 169 positiveWeek of 2021-12-01: 7 negativeWeek of 2022-01-01: 139 positiveWeek of 2022-01-01: 11 negativeWeek of 2022-02-01: 90 positiveWeek of 2022-02-01: 6 negativeWeek of 2022-03-01: 111 positiveWeek of 2022-03-01: 12 negativeWeek of 2022-04-01: 85 positiveWeek of 2022-04-01: 3 negativeWeek of 2022-05-01: 66 positiveWeek of 2022-05-01: 3 negativeWeek of 2022-06-01: 77 positiveWeek of 2022-06-01: 4 negativeWeek of 2022-07-01: 81 positiveWeek of 2022-07-01: 7 negativeWeek of 2022-08-01: 60 positiveWeek of 2022-08-01: 2 negativeWeek of 2022-09-01: 74 positiveWeek of 2022-09-01: 10 negativeWeek of 2022-10-01: 90 positiveWeek of 2022-10-01: 3 negativeWeek of 2022-11-01: 90 positiveWeek of 2022-11-01: 3 negativeWeek of 2022-12-01: 109 positiveWeek of 2022-12-01: 9 negativeWeek of 2023-01-01: 117 positiveWeek of 2023-01-01: 5 negativeWeek of 2023-02-01: 64 positiveWeek of 2023-02-01: 5 negativeWeek of 2023-03-01: 89 positiveWeek of 2023-03-01: 12 negativeWeek of 2023-04-01: 65 positiveWeek of 2023-04-01: 7 negativeWeek of 2023-05-01: 60 positiveWeek of 2023-05-01: 6 negativeWeek of 2023-06-01: 91 positiveWeek of 2023-06-01: 12 negativeWeek of 2023-07-01: 111 positiveWeek of 2023-07-01: 4 negativeWeek of 2023-08-01: 75 positiveWeek of 2023-08-01: 7 negativeWeek of 2023-09-01: 115 positiveWeek of 2023-09-01: 7 negativeWeek of 2023-10-01: 122 positiveWeek of 2023-10-01: 5 negativeWeek of 2023-11-01: 117 positiveWeek of 2023-11-01: 8 negativeWeek of 2023-12-01: 96 positiveWeek of 2023-12-01: 8 negativeWeek of 2024-01-01: 62 positiveWeek of 2024-01-01: 4 negativeWeek of 2024-02-01: 61 positiveWeek of 2024-02-01: 4 negativeWeek of 2024-03-01: 55 positiveWeek of 2024-03-01: 3 negativeWeek of 2024-04-01: 59 positiveWeek of 2024-04-01: 4 negativeWeek of 2024-05-01: 232 positiveWeek of 2024-05-01: 34 negativeWeek of 2024-06-01: 136 positiveWeek of 2024-06-01: 13 negativeWeek of 2024-07-01: 137 positiveWeek of 2024-07-01: 7 negativeWeek of 2024-08-01: 91 positiveWeek of 2024-08-01: 10 negativeWeek of 2024-09-01: 92 positiveWeek of 2024-09-01: 6 negativeWeek of 2024-10-01: 61 positiveWeek of 2024-10-01: 5 negativeWeek of 2024-11-01: 121 positiveWeek of 2024-11-01: 14 negativeWeek of 2024-12-01: 210 positiveWeek of 2024-12-01: 19 negativeWeek of 2025-01-01: 117 positiveWeek of 2025-01-01: 7 negativeWeek of 2025-02-01: 136 positiveWeek of 2025-02-01: 7 negativeWeek of 2025-03-01: 194 positiveWeek of 2025-03-01: 27 negativeWeek of 2025-04-01: 68 positiveWeek of 2025-04-01: 9 negativeWeek of 2025-05-01: 74 positiveWeek of 2025-05-01: 10 negativeWeek of 2025-06-01: 96 positiveWeek of 2025-06-01: 9 negativeWeek of 2025-07-01: 186 positiveWeek of 2025-07-01: 16 negativeWeek of 2025-08-01: 151 positiveWeek of 2025-08-01: 8 negativeWeek of 2025-09-01: 178 positiveWeek of 2025-09-01: 13 negativeWeek of 2025-10-01: 131 positiveWeek of 2025-10-01: 17 negativeWeek of 2025-11-01: 118 positiveWeek of 2025-11-01: 6 negativeWeek of 2025-12-01: 143 positiveWeek of 2025-12-01: 12 negativeWeek of 2026-01-01: 88 positiveWeek of 2026-01-01: 5 negativeWeek of 2026-02-01: 84 positiveWeek of 2026-02-01: 4 negativeWeek of 2026-03-01: 93 positiveWeek of 2026-03-01: 5 negativeWeek of 2026-04-01: 115 positiveWeek of 2026-04-01: 10 negativeWeek of 2026-05-01: 129 positiveWeek of 2026-05-01: 16 negativeWeek of 2026-06-01: 109 positiveWeek of 2026-06-01: 6 negativeWeek of 2026-07-01: 88 positiveWeek of 2026-07-01: 18 negativeWeek of 2026-08-01: 75 positiveWeek of 2026-08-01: 6 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

3391062026-08-06 21:00 — 231 players2026-08-07 05:00 — 141 players2026-08-07 13:00 — 206 players2026-08-07 21:00 — 264 players2026-08-08 05:00 — 167 players2026-08-08 13:00 — 210 players2026-08-08 21:00 — 333 players2026-08-09 05:00 — 248 players2026-08-09 13:00 — 255 players2026-08-09 21:00 — 287 players2026-08-10 05:00 — 160 players2026-08-10 13:00 — 197 players2026-08-10 21:00 — 213 players2026-08-11 05:00 — 137 players2026-08-11 13:00 — 184 players2026-08-12 21:00 — 236 players2026-08-14 04:00 — 148 players2026-08-15 12:00 — 212 players2026-08-16 20:00 — 339 players2026-08-18 03:00 — 194 players2026-08-19 11:00 — 130 players2026-08-20 18:00 — 285 players2026-08-22 02:00 — 207 players2026-08-23 09:00 — 174 players2026-08-24 17:00 — 271 players2026-08-26 01:00 — 171 players2026-08-27 09:00 — 132 players2026-08-28 17:00 — 294 players2026-08-30 01:00 — 200 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$26.32$0.802015-01-012026-08-212015-01-01 — best price $4.492015-03-23 — best price $19.992015-06-04 — best price $4.002015-08-31 — best price $19.992016-01-04 — best price $19.952016-05-26 — best price $4.992016-10-20 — best price $3.992017-02-15 — best price $17.952017-09-14 — best price $19.992018-03-31 — best price $19.992018-10-26 — best price $4.992019-05-14 — best price $4.992019-10-04 — best price $19.992020-01-09 — best price $4.992020-03-27 — best price $19.992020-06-11 — best price $4.392020-09-07 — best price $4.252020-11-05 — best price $4.992021-01-13 — best price $15.892021-03-06 — best price $15.992021-04-29 — best price $19.992021-06-08 — best price $14.692021-08-16 — best price $19.992021-11-06 — best price $15.992022-01-11 — best price $14.692022-05-04 — best price $15.892022-09-01 — best price $4.992023-01-05 — best price $19.992023-04-28 — best price $4.682023-08-25 — best price $4.992024-01-04 — best price $19.992024-05-19 — best price $15.742025-02-10 — best price $19.992025-10-27 — best price $1.992026-04-12 — best price $15.742026-08-06 — best price $1.992026-08-21 — best price $16.04
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

164562026-05-31 — 76 pageviews2026-06-03 — 72 pageviews2026-06-06 — 77 pageviews2026-06-09 — 84 pageviews2026-06-12 — 91 pageviews2026-06-15 — 95 pageviews2026-06-18 — 91 pageviews2026-06-21 — 83 pageviews2026-06-24 — 80 pageviews2026-06-27 — 117 pageviews2026-06-30 — 103 pageviews2026-07-03 — 85 pageviews2026-07-06 — 90 pageviews2026-07-09 — 116 pageviews2026-07-12 — 90 pageviews2026-07-15 — 97 pageviews2026-07-18 — 85 pageviews2026-07-21 — 84 pageviews2026-07-24 — 164 pageviews2026-07-27 — 122 pageviews2026-07-30 — 86 pageviews2026-08-02 — 88 pageviews2026-08-05 — 79 pageviews2026-08-08 — 84 pageviews2026-08-11 — 94 pageviews2026-08-14 — 92 pageviews2026-08-17 — 99 pageviews2026-08-20 — 117 pageviews2026-08-23 — 118 pageviews2026-08-26 — 96 pageviews2026-08-28 — 127 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Twitch viewers

102026-08-29 02:34 — 0 viewers2026-08-29 03:34 — 0 viewers2026-08-29 04:34 — 1 viewers2026-08-29 05:34 — 0 viewers2026-08-29 06:34 — 0 viewers2026-08-29 07:34 — 0 viewers2026-08-29 08:34 — 0 viewers
Hourly Twitch viewers (census snapshots).

Completion

60+
achievements tracked
66.7%
earned "Experimenticenticide"
16.6%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsmacOSLinuxSingle-playerMulti-playerCo-opCross-Platform MultiplayerSteam AchievementsSteam Trading CardsSteam WorkshopValve Anti-Cheat enabledStatsIncludes level editor21 DLC

7 supported languages: English, French, Italian, German, Spanish - Spain, Hungarian, Polish

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Steam (Steam)128,3012%285

Players tracked by Exophase (achievement/trophy trackers) — a sample of the player base, not total sales.

Where its players are

Share of Steam reviews by language (top languages measured) — a proxy for where the player base lives.

Player tags

FPSGoreCo-opActionHorrorShooterViolentZombiesModdableSurvival

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

Left 4 DeadRogue WarriorCall of Duty®: GhostsDying LightEnemy FrontGET EVENZiggurat

Similarity via IGDB.

Official site ↗Wikipedia ↗