The Game Census
Contagion cover art

Contagion

Monochrome, Inc · 2013-10-25

Steam

ActionAdventureIndie

Modes: Single player, Multiplayer, Co-operative

Releases: Oct 25, 2013 (PC (Microsoft Windows))

Contagion isn't your average Zombie Shooter but instead takes a more realistic and different approach to the popular genre with unique characters, environments, weapons, items, and a built in system that makes every round completely unpredictable with resources, objectives, and paths ever changing.

22
playing now
73%
positive of 16k reviews
Mostly Positive
steam rating
1,000,000–2,000,000
owners (SteamSpy est.)
58/100
IGDB user rating (24 ratings)
silver
deck/linux tier (ProtonDB)
$9.99
steam price (US)

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

Contagion is a survival horror first-person shooter video game, developed and published for PC by American independent studio Monochrome. It is the spiritual successor to Zombie Panic! Source. The game was mostly self-funded of its development, but with the support of others via a successful Kickstarter campaign, it was able to be released on Steam as an Early Access title. Contagion released on October 25, 2013 as a Steam Early Access title and was published as full release on April 11, 2014.

Health check

Quietly active
  • · 22 players in-game at the last census sample.
  • · 160 reviews in the last 8 weeks (~20/week).
  • · Review velocity down 30% vs the prior 8 weeks.
  • · Top 9% of 10,791 Action games in the census by review count.

Health tier since 2026-08-28

Estimated sales: 630k–1.3M copies

Review-multiple estimate from 15,738 total reviews — how this is computed.

All-time low: $1.00 at Fanatical (2017-05-02) · bundled 5×via IsThereAnyDeal

12-month high $9.99 · on sale 8 of 16 observed days (census price snapshots)

Review momentum

PositiveNegative
808020182026Week of 2018-01-01: 55 positiveWeek of 2018-01-01: 39 negativeWeek of 2018-02-01: 25 positiveWeek of 2018-02-01: 16 negativeWeek of 2018-03-01: 18 positiveWeek of 2018-03-01: 21 negativeWeek of 2018-04-01: 9 positiveWeek of 2018-04-01: 10 negativeWeek of 2018-05-01: 13 positiveWeek of 2018-05-01: 14 negativeWeek of 2018-06-01: 40 positiveWeek of 2018-06-01: 24 negativeWeek of 2018-07-01: 30 positiveWeek of 2018-07-01: 22 negativeWeek of 2018-08-01: 18 positiveWeek of 2018-08-01: 12 negativeWeek of 2018-09-01: 17 positiveWeek of 2018-09-01: 15 negativeWeek of 2018-10-01: 12 positiveWeek of 2018-10-01: 8 negativeWeek of 2018-11-01: 30 positiveWeek of 2018-11-01: 7 negativeWeek of 2018-12-01: 26 positiveWeek of 2018-12-01: 6 negativeWeek of 2019-01-01: 18 positiveWeek of 2019-01-01: 7 negativeWeek of 2019-02-01: 17 positiveWeek of 2019-02-01: 10 negativeWeek of 2019-03-01: 20 positiveWeek of 2019-03-01: 12 negativeWeek of 2019-04-01: 14 positiveWeek of 2019-04-01: 11 negativeWeek of 2019-05-01: 10 positiveWeek of 2019-05-01: 9 negativeWeek of 2019-06-01: 29 positiveWeek of 2019-06-01: 19 negativeWeek of 2019-07-01: 31 positiveWeek of 2019-07-01: 16 negativeWeek of 2019-08-01: 4 positiveWeek of 2019-08-01: 7 negativeWeek of 2019-09-01: 10 positiveWeek of 2019-09-01: 8 negativeWeek of 2019-10-01: 6 positiveWeek of 2019-10-01: 10 negativeWeek of 2019-11-01: 43 positiveWeek of 2019-11-01: 10 negativeWeek of 2019-12-01: 44 positiveWeek of 2019-12-01: 20 negativeWeek of 2020-01-01: 65 positiveWeek of 2020-01-01: 7 negativeWeek of 2020-02-01: 41 positiveWeek of 2020-02-01: 12 negativeWeek of 2020-03-01: 36 positiveWeek of 2020-03-01: 8 negativeWeek of 2020-04-01: 38 positiveWeek of 2020-04-01: 11 negativeWeek of 2020-05-01: 26 positiveWeek of 2020-05-01: 8 negativeWeek of 2020-06-01: 31 positiveWeek of 2020-06-01: 7 negativeWeek of 2020-07-01: 19 positiveWeek of 2020-07-01: 1 negativeWeek of 2020-08-01: 80 positiveWeek of 2020-08-01: 28 negativeWeek of 2020-09-01: 32 positiveWeek of 2020-09-01: 11 negativeWeek of 2020-10-01: 36 positiveWeek of 2020-10-01: 9 negativeWeek of 2020-11-01: 36 positiveWeek of 2020-11-01: 8 negativeWeek of 2020-12-01: 29 positiveWeek of 2020-12-01: 11 negativeWeek of 2021-01-01: 31 positiveWeek of 2021-01-01: 14 negativeWeek of 2021-02-01: 30 positiveWeek of 2021-02-01: 8 negativeWeek of 2021-03-01: 52 positiveWeek of 2021-03-01: 8 negativeWeek of 2021-04-01: 22 positiveWeek of 2021-04-01: 6 negativeWeek of 2021-05-01: 50 positiveWeek of 2021-05-01: 8 negativeWeek of 2021-06-01: 21 positiveWeek of 2021-06-01: 10 negativeWeek of 2021-07-01: 56 positiveWeek of 2021-07-01: 17 negativeWeek of 2021-08-01: 37 positiveWeek of 2021-08-01: 15 negativeWeek of 2021-09-01: 36 positiveWeek of 2021-09-01: 9 negativeWeek of 2021-10-01: 26 positiveWeek of 2021-10-01: 6 negativeWeek of 2021-11-01: 39 positiveWeek of 2021-11-01: 8 negativeWeek of 2021-12-01: 31 positiveWeek of 2021-12-01: 4 negativeWeek of 2022-01-01: 18 positiveWeek of 2022-01-01: 10 negativeWeek of 2022-02-01: 22 positiveWeek of 2022-02-01: 6 negativeWeek of 2022-03-01: 22 positiveWeek of 2022-03-01: 3 negativeWeek of 2022-04-01: 53 positiveWeek of 2022-04-01: 9 negativeWeek of 2022-05-01: 36 positiveWeek of 2022-05-01: 9 negativeWeek of 2022-06-01: 34 positiveWeek of 2022-06-01: 12 negativeWeek of 2022-07-01: 23 positiveWeek of 2022-07-01: 10 negativeWeek of 2022-08-01: 24 positiveWeek of 2022-08-01: 3 negativeWeek of 2022-09-01: 23 positiveWeek of 2022-09-01: 4 negativeWeek of 2022-10-01: 19 positiveWeek of 2022-10-01: 8 negativeWeek of 2022-11-01: 34 positiveWeek of 2022-11-01: 10 negativeWeek of 2022-12-01: 28 positiveWeek of 2022-12-01: 2 negativeWeek of 2023-01-01: 31 positiveWeek of 2023-01-01: 11 negativeWeek of 2023-02-01: 25 positiveWeek of 2023-02-01: 6 negativeWeek of 2023-03-01: 42 positiveWeek of 2023-03-01: 8 negativeWeek of 2023-04-01: 20 positiveWeek of 2023-04-01: 12 negativeWeek of 2023-05-01: 26 positiveWeek of 2023-05-01: 13 negativeWeek of 2023-06-01: 16 positiveWeek of 2023-06-01: 4 negativeWeek of 2023-07-01: 27 positiveWeek of 2023-07-01: 3 negativeWeek of 2023-08-01: 26 positiveWeek of 2023-08-01: 10 negativeWeek of 2023-09-01: 16 positiveWeek of 2023-09-01: 3 negativeWeek of 2023-10-01: 24 positiveWeek of 2023-10-01: 7 negativeWeek of 2023-11-01: 15 positiveWeek of 2023-11-01: 5 negativeWeek of 2023-12-01: 24 positiveWeek of 2023-12-01: 10 negativeWeek of 2024-01-01: 19 positiveWeek of 2024-01-01: 6 negativeWeek of 2024-02-01: 20 positiveWeek of 2024-02-01: 17 negativeWeek of 2024-03-01: 20 positiveWeek of 2024-03-01: 8 negativeWeek of 2024-04-01: 29 positiveWeek of 2024-04-01: 8 negativeWeek of 2024-05-01: 19 positiveWeek of 2024-05-01: 8 negativeWeek of 2024-06-01: 15 positiveWeek of 2024-06-01: 7 negativeWeek of 2024-07-01: 18 positiveWeek of 2024-07-01: 8 negativeWeek of 2024-08-01: 13 positiveWeek of 2024-08-01: 8 negativeWeek of 2024-09-01: 25 positiveWeek of 2024-09-01: 6 negativeWeek of 2024-10-01: 23 positiveWeek of 2024-10-01: 4 negativeWeek of 2024-11-01: 32 positiveWeek of 2024-11-01: 15 negativeWeek of 2024-12-01: 40 positiveWeek of 2024-12-01: 16 negativeWeek of 2025-01-01: 12 positiveWeek of 2025-01-01: 6 negativeWeek of 2025-02-01: 12 positiveWeek of 2025-02-01: 11 negativeWeek of 2025-03-01: 15 positiveWeek of 2025-03-01: 9 negativeWeek of 2025-04-01: 14 positiveWeek of 2025-04-01: 5 negativeWeek of 2025-05-01: 18 positiveWeek of 2025-05-01: 6 negativeWeek of 2025-06-01: 20 positiveWeek of 2025-06-01: 11 negativeWeek of 2025-07-01: 29 positiveWeek of 2025-07-01: 7 negativeWeek of 2025-08-01: 28 positiveWeek of 2025-08-01: 9 negativeWeek of 2025-09-01: 18 positiveWeek of 2025-09-01: 6 negativeWeek of 2025-10-01: 15 positiveWeek of 2025-10-01: 8 negativeWeek of 2025-11-01: 30 positiveWeek of 2025-11-01: 4 negativeWeek of 2025-12-01: 19 positiveWeek of 2025-12-01: 1 negativeWeek of 2026-01-01: 17 positiveWeek of 2026-01-01: 5 negativeWeek of 2026-02-01: 18 positiveWeek of 2026-02-01: 12 negativeWeek of 2026-03-01: 10 positiveWeek of 2026-03-01: 4 negativeWeek of 2026-04-01: 11 positiveWeek of 2026-04-01: 8 negativeWeek of 2026-05-01: 22 positiveWeek of 2026-05-01: 7 negativeWeek of 2026-06-01: 10 positiveWeek of 2026-06-01: 1 negativeWeek of 2026-07-01: 9 positiveWeek of 2026-07-01: 6 negativeWeek of 2026-08-01: 12 positiveWeek of 2026-08-01: 7 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

4282026-08-06 21:00 — 14 players2026-08-07 05:00 — 16 players2026-08-07 13:00 — 33 players2026-08-07 21:00 — 17 players2026-08-08 05:00 — 25 players2026-08-08 13:00 — 35 players2026-08-08 21:00 — 10 players2026-08-09 05:00 — 25 players2026-08-09 13:00 — 42 players2026-08-09 21:00 — 27 players2026-08-10 05:00 — 19 players2026-08-10 13:00 — 29 players2026-08-10 21:00 — 8 players2026-08-11 05:00 — 18 players2026-08-11 13:00 — 32 players2026-08-12 21:00 — 14 players2026-08-14 05:00 — 12 players2026-08-15 12:00 — 25 players2026-08-16 20:00 — 28 players2026-08-18 04:00 — 16 players2026-08-19 11:00 — 27 players2026-08-20 19:00 — 16 players2026-08-22 02:00 — 13 players2026-08-23 10:00 — 29 players2026-08-24 18:00 — 22 players2026-08-26 02:00 — 19 players2026-08-27 10:00 — 21 players2026-08-28 17:00 — 29 players2026-08-30 01:00 — 22 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$19.99$0.002015-01-012026-07-092015-01-01 — best price $9.992015-08-28 — best price $9.992016-01-05 — best price $9.992016-10-24 — best price $9.992017-05-02 — best price $1.002017-11-22 — best price $2.492018-06-21 — best price $2.492018-11-27 — best price $9.992019-05-16 — best price $2.492019-11-26 — best price $2.492020-01-22 — best price $4.992020-04-28 — best price $9.992020-08-28 — best price $7.492021-01-02 — best price $9.992021-03-08 — best price $3.992021-05-14 — best price $5.002021-07-19 — best price $3.992021-10-25 — best price $5.002021-12-22 — best price $4.992022-03-01 — best price $5.002022-05-09 — best price $4.992022-09-01 — best price $4.992022-11-02 — best price $9.992022-12-13 — best price $4.002023-02-13 — best price $4.992023-05-15 — best price $9.992023-08-21 — best price $9.992023-11-06 — best price $9.992024-02-12 — best price $3.992024-06-03 — best price $9.992024-09-27 — best price $9.992024-12-19 — best price $2.992025-07-10 — best price $9.992026-02-09 — best price $3.992026-07-09 — best price $9.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

6842026-05-30 — 14 pageviews2026-06-02 — 18 pageviews2026-06-05 — 16 pageviews2026-06-08 — 18 pageviews2026-06-11 — 13 pageviews2026-06-14 — 13 pageviews2026-06-17 — 11 pageviews2026-06-20 — 14 pageviews2026-06-23 — 12 pageviews2026-06-26 — 10 pageviews2026-06-29 — 16 pageviews2026-07-02 — 11 pageviews2026-07-05 — 16 pageviews2026-07-08 — 18 pageviews2026-07-11 — 13 pageviews2026-07-14 — 15 pageviews2026-07-17 — 4 pageviews2026-07-20 — 15 pageviews2026-07-23 — 10 pageviews2026-07-26 — 9 pageviews2026-07-29 — 10 pageviews2026-08-01 — 10 pageviews2026-08-04 — 16 pageviews2026-08-07 — 14 pageviews2026-08-10 — 23 pageviews2026-08-13 — 18 pageviews2026-08-16 — 17 pageviews2026-08-19 — 16 pageviews2026-08-22 — 21 pageviews2026-08-25 — 48 pageviews2026-08-27 — 20 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Completion

60+
achievements tracked
32.2%
earned "Ankle Biter"
1.5%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsSingle-playerMulti-playerPvPOnline PvPCo-opOnline Co-opSteam AchievementsSteam Trading CardsCaptions availableSteam Workshop2 DLC

10 supported languages: English, Simplified Chinese, Traditional Chinese, Portuguese - Brazil, Korean, Turkish, Italian, Russian, Japanese, Ukrainian

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Steam (Steam)22,8500%165

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

Player tags

3DFPSPvEPvPCo-opHorrorShooterZombiesModdableSurvival

Census log

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

Players also track

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Similarity via IGDB.

Official site ↗Wikipedia ↗