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Mushroom 11

Mushroom 11

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?

Released Oct 15, 2015 Developer Untame Platforms Windows · Mac · Linux IndieActionAdventurePuzzlePlatformer
View on Steam ↗ $14.99 (US · as of 2026-07-26)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.

84.3%positive676 reviews
Recommended · 0 found this helpful

“Mold was never this fun! Plays a little wonky on Steam Deck but gyro controls are kinda useful for once.”

— a player, Steam review · 5 hrs played
Read more reviews ↗

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-07-25.

35achievements
2.0%median completion
0.6%rarest: Chapter 7 No Death
58.8% of players 38.1% of players 28.5% of players 20.1% of players 15.0% of players 12.2% of players 11.2% of players 7.5% of players 7.3% of players 6.8% of players 4.7% of players 3.9% of players 3.8% of players 2.9% of players 2.6% of players 2.4% of players 2.0% of players 2.0% of players 1.9% of players 1.6% of players 1.3% of players 1.2% of players 1.1% of players 1.1% of players 1.0% of players 1.0% of players 0.9% of players 0.9% of players 0.9% of players 0.8% of players 0.7% of players 0.7% of players 0.7% of players 0.6% of players 0.6% of players 58.8% 0% most earned rarest
Almost everyone has
58.8%Boss 1 Defeated — Beat Chapter 1 Boss
38.1%Boss 2 Defeated — Beat Chapter 2 Boss
28.5%Boss 3 Defeated — Beat Chapter 3 Boss
Rarest badges of honor
0.6%Chapter 7 No Death — Complete Chapter 7 In a Single No Death Run
0.6%Chapter 6 No Death — Complete Chapter 6 In a Single No Death Run
0.7%Ultimate Rocket Ride — Extreme Rocket Maneuver Skills

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-25. Steam prices vary by region — always confirm your local price on Steam.

$14.99current · sampled 2026-07-26 08:39 UTC
$14.99lowest since tracking began2026-07-25
US14.99 USD
UK10.99 GBP
Australia21.50 AUD
Canada16.99 CAD
Japan1,480 JPY
Brazil27.99 BRL
China48.00 CNY

Regional prices at last sample, in local currency — Steam sets each region's price independently.

Brazil≈$5.5 China Japan Canada UK US Australia≈$15

Cheapest → most expensive, converted to USD at ECB reference rates (2026-07-24). Relative comparison only.

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

May 04, 2016
Version 1.07 is Out!

Hi everyone! We've been pretty quiet lately, working hard on improving the game and porting it to more platforms (more on this soon). In the meantime we wanted to update the desktop builds with some g

May 04, 2016
Version 1.07 is Out!

Hi everyone! We've been pretty quiet lately, working hard on improving the game and porting it to more platforms (more on this soon). In the meantime we wanted to update the desktop builds with some g

Jan 12, 2016
Best Platformer of 2015!

Mushroom 11 has been selected as Rock, Paper, Shotgun's Best Platformer of the Year! "Mushroom 11 stands out by being a brilliantly smart idea, superbly executed, and constantly rewarding to play." -

Jan 12, 2016
Best Platformer of 2015!

Mushroom 11 has been selected as Rock, Paper, Shotgun's Best Platformer of the Year! "Mushroom 11 stands out by being a brilliantly smart idea, superbly executed, and constantly rewarding to play." -

Dec 16, 2015
Mushroom 11 is in IGN's Best of 2015!

http://untame.com/wp-content/uploads/2015/12/ign_best_of_2015_sm-e1450305108854.jpg We're extremely proud to be listed as IGN's Best of 2015! Mushroom 11 is listed in two categories - Best Platformer

Games like Mushroom 11

From our knowledge graph — ranked by shared traits, not a black box. Each card says why it's here.

Teslagrad Teslagrad 80.5% · 1,243 reviews shares Puzzle Platformer, Physics, Difficult, Platformer Scrap Garden Scrap Garden 71.3% · 515 reviews shares Post Apocalyptic, Puzzle Platformer, Physics, Platformer The Bridge The Bridge 84.0% · 1,757 reviews shares Puzzle Platformer, Physics, Difficult, Platformer Rain World Rain World 94.7% · 34,493 reviews shares Post Apocalyptic, Physics, Difficult, Platformer Q.U.B.E: Director's Cut Q.U.B.E: Director's Cut 78.1% · 1,231 reviews shares Puzzle Platformer, Physics, Difficult, Platformer Snake Pass Snake Pass 78.7% · 2,120 reviews shares Puzzle Platformer, Physics, Difficult, Platformer Trine Enchanted Edition Trine Enchanted Edition 94.4% · 6,023 reviews shares Puzzle Platformer, Physics, Platformer, Puzzle Trine 2: Complete Story Trine 2: Complete Story 94.8% · 8,590 reviews shares Puzzle Platformer, Physics, Platformer, Puzzle

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-05-20.

GenresAction, Adventure, Indie
Player tagsIndie · Action · Adventure · Puzzle · Platformer · Puzzle-Platformer · Physics · Experimental · 2D · Atmospheric · Post-apocalyptic · Music (SteamSpy community voting)
FeaturesSingle-player · Steam Achievements · Steam Trading Cards · Family Sharing
LanguagesEnglish
Achievements35
Estimated owners100,000 – 200,000 (SteamSpy)
Official sitehttp://mushroom11.com
Minimum system requirements (PC)

Minimum: OS *: Windows XP and up Memory: 2 GB RAM Storage: 500 MB available space