The Game Census
Mushroom 11 cover art

Mushroom 11

Untame · 2015-10-15

SteamGOG

ActionAdventureIndie

Modes: Single player · Perspectives: Side view

Releases: Oct 15, 2015 (PC (Microsoft Windows)), Oct 15, 2015 (Mac), Oct 15, 2015 (Linux), Mar 09, 2017 (iOS), Mar 08, 2017 (Android)

An award-winning anti-platformer where destruction is the only way to move. Mold yourself into any form by destroying your cells, and traverse a devastated landscape filled with brain-twisting puzzles and bizarre mutations. Are you ready to break the mold?

Mushroom 11 is an Action, Adventure, Indie game released in 2015, priced at $14.99, with an estimated 100,000 .. 200,000 owners and a Very Positive review sentiment (84% of 685 reviews).

1
playing now
84%
positive of 685 reviews
Very Positive
steam's rating (official)
100,000–200,000
owners (SteamSpy est.)
81/100
critic score (5 outlets, IGDB)
53/100
IGDB user rating (10 ratings)
pending
deck/linux tier (ProtonDB)
$14.99
steam price (US)

1 players in-game as of 2026-10-15 07:00 UTC (census sample)

Mushroom 11 is a 2015 puzzle-platform game developed and published by Untame. The game is a 2D side-scroller where players control a green mushroom by deleting parts of cells while it simultaneously regrows. The mushroom can be split and shaped to solve puzzles.

Health check

Quiet
  • · 1 players in-game at the last census sample.
  • · 2 reviews in the last 8 weeks (~0/week).
  • · Review velocity down 71% vs the prior 8 weeks.
  • · Top 18% of 27,908 Action games in the census by review count.

Health tier since 2026-08-31

Estimated sales: 17k–41k copies

Review-multiple estimate from 685 total reviews — how this is computed.

Current store prices

GOG$14.99

Deal snapshots via CheapShark, refreshed daily.

All-time low: $5.99 at Steam (2019-01-25) · bundled 3×via IsThereAnyDeal

12-month high $14.99 · on sale 1 of 49 observed days · $9.00 above the all-time low (census price snapshots)

Review momentum

PositiveNegative
4420162026Week of 2016-09-01: 2 positiveWeek of 2016-09-01: 1 negativeWeek of 2016-10-01: 1 positiveWeek of 2016-11-01: 2 positiveWeek of 2016-12-01: 1 positiveWeek of 2017-01-01: 1 positiveWeek of 2017-03-01: 1 positiveWeek of 2017-05-01: 1 positiveWeek of 2017-06-01: 1 positiveWeek of 2017-07-01: 1 negativeWeek of 2017-09-01: 1 positiveWeek of 2017-11-01: 2 positiveWeek of 2017-12-01: 2 positiveWeek of 2017-12-01: 1 negativeWeek of 2018-01-01: 2 positiveWeek of 2018-01-01: 1 negativeWeek of 2018-06-01: 1 positiveWeek of 2018-11-01: 1 positiveWeek of 2019-01-01: 3 positiveWeek of 2019-02-01: 1 positiveWeek of 2019-02-01: 1 negativeWeek of 2019-03-01: 1 positiveWeek of 2019-04-01: 2 positiveWeek of 2019-05-01: 1 positiveWeek of 2019-06-01: 4 positiveWeek of 2019-07-01: 3 positiveWeek of 2019-10-01: 1 positiveWeek of 2019-11-01: 1 positiveWeek of 2019-12-01: 1 positiveWeek of 2020-03-01: 2 positiveWeek of 2020-04-01: 1 negativeWeek of 2020-05-01: 1 positiveWeek of 2020-06-01: 1 positiveWeek of 2020-07-01: 3 positiveWeek of 2020-10-01: 2 positiveWeek of 2021-02-01: 2 positiveWeek of 2021-06-01: 1 positiveWeek of 2021-08-01: 1 positiveWeek of 2021-09-01: 1 positiveWeek of 2021-10-01: 1 positiveWeek of 2021-12-01: 3 positiveWeek of 2022-05-01: 1 negativeWeek of 2022-06-01: 1 positiveWeek of 2022-11-01: 1 positiveWeek of 2022-12-01: 1 positiveWeek of 2023-01-01: 3 positiveWeek of 2023-03-01: 1 negativeWeek of 2023-06-01: 1 positiveWeek of 2023-07-01: 2 positiveWeek of 2023-08-01: 1 positiveWeek of 2023-09-01: 1 positiveWeek of 2023-10-01: 1 positiveWeek of 2023-12-01: 1 positiveWeek of 2024-04-01: 2 positiveWeek of 2024-06-01: 1 positiveWeek of 2024-07-01: 1 positiveWeek of 2024-12-01: 1 positiveWeek of 2025-03-01: 1 positiveWeek of 2025-04-01: 1 positiveWeek of 2025-05-01: 2 positiveWeek of 2026-02-01: 1 positiveWeek of 2026-06-01: 1 positiveWeek of 2026-08-01: 1 positive
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

202026-09-15 16:00 — 1 players2026-09-17 01:00 — 1 players2026-09-18 08:00 — 1 players2026-09-19 16:00 — 1 players2026-09-20 23:00 — 1 players2026-09-22 07:00 — 0 players2026-09-23 14:00 — 0 players2026-09-24 22:00 — 0 players2026-09-26 05:00 — 0 players2026-09-27 13:00 — 1 players2026-09-28 20:00 — 0 players2026-09-30 04:00 — 0 players2026-10-01 11:00 — 1 players2026-10-02 19:00 — 0 players2026-10-04 03:00 — 0 players2026-10-05 11:00 — 1 players2026-10-06 18:00 — 0 players2026-10-08 02:00 — 1 players2026-10-09 09:00 — 0 players2026-10-10 17:00 — 1 players2026-10-12 00:00 — 1 players2026-10-13 08:00 — 2 players2026-10-14 15:00 — 1 players2026-10-15 07:00 — 1 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$19.99$5.992015-01-012026-10-152015-01-01 — best price $19.992015-10-22 — best price $14.992015-12-11 — best price $14.992016-02-22 — best price $7.492016-06-23 — best price $11.242016-10-26 — best price $7.002017-05-25 — best price $14.992017-11-01 — best price $14.992017-12-21 — best price $7.492018-05-10 — best price $7.492019-01-25 — best price $5.992019-05-10 — best price $7.492019-06-25 — best price $7.492019-08-29 — best price $7.492019-12-01 — best price $7.492020-01-22 — best price $7.492020-12-22 — best price $7.492021-06-24 — best price $7.492021-11-24 — best price $9.892022-01-27 — best price $9.892022-11-22 — best price $9.892023-03-16 — best price $9.892023-07-07 — best price $14.992023-12-21 — best price $7.492024-12-19 — best price $8.992025-06-26 — best price $7.492026-08-30 — best price $14.992026-09-03 — best price $14.992026-09-07 — best price $14.992026-09-11 — best price $14.992026-09-15 — best price $14.992026-09-19 — best price $14.992026-09-23 — best price $14.992026-09-27 — best price $14.992026-10-01 — best price $14.992026-10-05 — best price $14.992026-10-09 — best price $14.992026-10-13 — best price $14.992026-10-15 — best price $14.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

802026-06-01 — 5 pageviews2026-06-05 — 3 pageviews2026-06-09 — 4 pageviews2026-06-13 — 2 pageviews2026-06-17 — 3 pageviews2026-06-22 — 1 pageviews2026-06-26 — 5 pageviews2026-06-30 — 0 pageviews2026-07-04 — 5 pageviews2026-07-08 — 5 pageviews2026-07-12 — 0 pageviews2026-07-16 — 3 pageviews2026-07-20 — 5 pageviews2026-07-25 — 2 pageviews2026-07-29 — 1 pageviews2026-08-02 — 1 pageviews2026-08-06 — 2 pageviews2026-08-10 — 2 pageviews2026-08-14 — 1 pageviews2026-08-19 — 3 pageviews2026-08-23 — 2 pageviews2026-08-27 — 0 pageviews2026-08-31 — 4 pageviews2026-09-04 — 2 pageviews2026-09-08 — 4 pageviews2026-09-13 — 1 pageviews2026-09-17 — 0 pageviews2026-09-21 — 3 pageviews2026-09-25 — 6 pageviews2026-09-29 — 4 pageviews2026-10-03 — 5 pageviews2026-10-07 — 8 pageviews2026-10-11 — 1 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Completion

35
achievements tracked
58.8%
earned "Boss 1 Defeated"
2%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsmacOSLinuxSingle-playerSteam AchievementsSteam Trading CardsFamily Sharing1 DLC

1 supported languages: English

Post-launch support: 1 DLC released, first 2015-10-15 (Steam store data)

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Steam (Steam)4,0381%35

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

Player tags

2DIndieMusicActionPuzzlePhysicsAdventureDifficultPlatformerAtmospheric

Census log

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

Players also track

VaganteDon't Knock TwiceSurvivalistToby: The Secret MinePLANET ALPHAForgotton AnnePikunikuSemblance

Similarity via IGDB.

Wikipedia ↗Official site ↗