The Game Census
UNDEAD FACTORY:Zombie Pandemic cover art

UNDEAD FACTORY:Zombie Pandemic

BTD STUDIO Co.,ltd. · 2018-04-16

Steam

Free To PlayStrategy

Modes: Single player, Multiplayer

Releases: Dec 21, 2017 (iOS), Feb 16, 2016 (PC (Microsoft Windows)), Dec 21, 2017 (Android)

Survive zombie apocalypse! Plunder resources for survival!

UNDEAD FACTORY:Zombie Pandemic is a Free To Play and Strategy title released in 2018, free-to-play, with an estimated 20,000 to 50,000 owners and a Mixed review sentiment (57% of 101 reviews).

0
playing now
57%
positive of 101 reviews
Mixed
steam's rating (official)
20,000–50,000
owners (SteamSpy est.)
pending
deck/linux tier (ProtonDB)
Free
steam price (US)

0 players in-game as of 2026-10-15 00:00 UTC (census sample)

Health check

Quiet
  • · 0 players in-game at the last census sample.
  • · 10 reviews in the last 8 weeks (~1/week).
  • · Review velocity down 9% vs the prior 8 weeks.
  • · Current weekly pace is under 5% of the all-time peak week (30 reviews).
  • · Top 37% of 9,549 Free To Play games in the census by review count.

Health tier since 2026-09-01

Review momentum

PositiveNegative
191920182026Week of 2018-04-01: 11 positiveWeek of 2018-04-01: 19 negativeWeek of 2018-05-01: 1 positiveWeek of 2018-05-01: 7 negativeWeek of 2018-06-01: 2 positiveWeek of 2018-06-01: 1 negativeWeek of 2018-07-01: 1 negativeWeek of 2018-09-01: 3 negativeWeek of 2018-11-01: 11 positiveWeek of 2018-12-01: 7 positiveWeek of 2019-01-01: 2 positiveWeek of 2019-02-01: 3 positiveWeek of 2019-03-01: 1 positiveWeek of 2019-04-01: 1 negativeWeek of 2019-07-01: 1 negativeWeek of 2019-09-01: 2 positiveWeek of 2019-10-01: 1 negativeWeek of 2019-11-01: 1 positiveWeek of 2020-01-01: 2 positiveWeek of 2020-03-01: 2 positiveWeek of 2020-04-01: 1 positiveWeek of 2020-04-01: 1 negativeWeek of 2020-07-01: 1 negativeWeek of 2020-11-01: 1 negativeWeek of 2020-12-01: 1 negativeWeek of 2021-01-01: 1 positiveWeek of 2021-01-01: 2 negativeWeek of 2021-06-01: 1 positiveWeek of 2021-09-01: 1 negativeWeek of 2021-10-01: 1 positiveWeek of 2022-05-01: 1 positiveWeek of 2022-05-01: 1 negativeWeek of 2022-09-01: 1 positiveWeek of 2022-11-01: 1 negativeWeek of 2023-01-01: 1 positiveWeek of 2023-02-01: 1 positiveWeek of 2023-05-01: 1 positiveWeek of 2023-07-01: 2 positiveWeek of 2023-10-01: 1 positiveWeek of 2023-12-01: 1 negativeWeek of 2024-02-01: 2 positiveWeek of 2024-03-01: 1 positiveWeek of 2024-04-01: 1 negativeWeek of 2024-05-01: 1 positiveWeek of 2024-06-01: 2 positiveWeek of 2024-08-01: 1 positiveWeek of 2024-11-01: 1 positiveWeek of 2025-02-01: 1 negativeWeek of 2025-07-01: 2 positiveWeek of 2025-08-01: 1 positiveWeek of 2025-08-01: 1 negativeWeek of 2025-09-01: 1 negativeWeek of 2025-11-01: 1 positiveWeek of 2026-03-01: 1 negativeWeek of 2026-05-01: 1 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

102026-09-15 09:00 — 0 players2026-09-16 17:00 — 0 players2026-09-18 01:00 — 0 players2026-09-19 08:00 — 0 players2026-09-20 16:00 — 0 players2026-09-21 23:00 — 0 players2026-09-23 07:00 — 0 players2026-09-24 14:00 — 1 players2026-09-25 22:00 — 0 players2026-09-27 05:00 — 0 players2026-09-28 13:00 — 0 players2026-09-29 21:00 — 0 players2026-10-01 04:00 — 0 players2026-10-02 12:00 — 0 players2026-10-03 19:00 — 0 players2026-10-05 03:00 — 0 players2026-10-06 11:00 — 0 players2026-10-07 18:00 — 0 players2026-10-09 02:00 — 0 players2026-10-10 09:00 — 0 players2026-10-11 17:00 — 0 players2026-10-13 01:00 — 0 players2026-10-14 08:00 — 0 players2026-10-15 00:00 — 0 players
Concurrent players, hourly average, last 30 days (census samples).

Completion

60+
achievements tracked
33.2%
earned "Prepared for Glory"
12.8%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsSingle-playerMulti-playerPvPOnline PvPIn-App PurchasesFamily Sharing

10 supported languages: English, French, Italian, German, Spanish - Spain, Portuguese - Portugal, Russian, Simplified Chinese, Traditional Chinese, Japanese

Player tags

RTSIndieZombiesStrategyFree to Play

Census log

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

Players also track

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Similarity via IGDB.

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