Transformice logo
Official logo for Transformice
Developer(s) Atelier 801
Publisher(s) Atelier 801
Designer(s) Tigrounette
Engine Adobe Flash Player 10
Platform(s) Online (Adobe Flash)
Microsoft Windows
Release date(s) May 1, 2010
Genre(s) Massively multiplayer online
Mode(s) Multiplayer

Transformice (sometimes abbreviated to TFM or T4M) is an online independent multiplayer free-to-play platform video game, created by French game designers, known by their aliases Melibellule and Tigrounette. Melibellule produces the game's artwork and graphics, while Tigrounette programs the game's functions and mechanics. Transformice was released as a browser game on May 1, 2010,[2] and on Steam as a free-to-play game on January 30, 2015.[3] Transformice requires either a web browser running Adobe Flash Player 9.0+, Adobe AIR to run the official standalone or Steam to play the game. As of 2012, the game has 10 million accounts created,[4][5] 60 million as of 2015,[6] 70 million as of 2017,[7] and 100 million as of 2019.[8]



Mice racing around a user-created map to figure out how to get to the cheese. Bubbles indicate a mouse who falls off the map. Hearts indicate a mouse who has brought the cheese to the hole.

The main objective of the game is to collect a piece of cheese placed in at least one location on a map. Players control a mouse with the arrow keys or the WASD keys to run, duck, jump and perform various techniques, such as wall jumping, long jumping, turn arounds, and corner jumping. Players' mice must touch the cheese to collect it. After which, the player must take the collected cheese back to the map's mouse hole to finish. The number of cheese and mouse holes varies between maps. Players are awarded points on a scoreboard that is updated in real-time. Bonus points are awarded for players who place first, second or third. Collecting cheese is recorded into a player's permanent stats when there are about 2 or more players in the room. Players are also given extra recognition in their stats for finishing first when there are eleven or more players in the room. Maps have a general time limit of two minutes, at which time a new map is loaded. Maps can instantly switch before the time limit if all players complete the map or die. The timer will change to 20 seconds if the Shaman dies or there if are only two mice left on the map. Dying adds one point to a player's score on the scoreboard, no matter what time in the game it is or the cause of death.

When a player reaches the highest score on the scoreboard, they will become a Shaman in the next map involving one. The general objective of the Shaman is to help the other mice obtain the cheese and bring it back to the hole. Doing so will award the Shaman with "saves" for each mouse who completes the map, which are recorded onto the player's profile. The Shaman can do so by summoning objects such as planks, boxes, anvils, spirit, and balloons to create buildings or contraptions such as bridges to cross gaps or various other obstacles. A Shaman can 'anchor' or connect planks and boxes to other world objects or summoned objects with various-colored nails. Red nails keep an object firmly grounded and will not move, but it can rotate on the anchor. Yellow nails connect to most other objects, particularly red-nailed ones, and keep an object's placement, but can move. Blue nails connect two objects but are loose and can rotate.

Upon reaching 1,000 total saves as a Shaman, a player can choose to become a 'hard mode' Shaman. In hard mode, a Shaman cannot use red nails which anchor an object solidly, nor can they use the Spirit tool, which can push mice and objects with a flash of light. Spirit is the only object allowed to be cast outside of summoning range. In lieu of this, hard mode Shamans can create a pre-made 'totem', which is constructed on an in-game editor map. Totems can be constructed with up to 20 objects, but only one red nail may be used as an anchor. A completed totem construction can be summoned instantly as a hard mode Shaman and is immediately functional, but may only be summoned once per map. After saving 5,000 total mice, 2,000 being in hard mode, a player will unlock the 'divine mode' Shaman setting, a setting released as an update on May 26, 2014.[9] In addition to not being able to use red nails and the Spirit tool, a divine mode shaman cannot use yellow nails which connect and stabilize most objects, nor can they use a totem. Despite the constraints, divine mode Shamans have the ability to spawn available objects almost anywhere on a map.

Collected cheese is also saved up and used as currency in the game. Players can use this currency to buy virtual clothing items for their mouse in the game's item shop. Players can also buy virtual clothing items by purchasing 'fraises', an in-game currency that can be obtained by paying real money. Items are purely visual and do not give bonus stats. Players can also create their own maps via an in-game editor. Created maps must be verified by a test run of the map where the creator has to be able to successfully collect the cheese and bring it back to the hole. Once verified, players can choose to submit their map into rotation at the cost of 40 cheese.

An in-game achievement system awards players with new titles and badges. Titles are awarded for collecting specific numbers of cheese, obtaining a certain amount of first place victories, accumulating saves as a Shaman, buying items from the shop and completing events. Badges are awarded for buying any type of fur (except plains) from the shop and completing events.

An experience and level system[10] was added on July 29, 2013, allowing mice to unlock Shaman abilities and traits by collecting cheese and saving mice. The abilities are separated into five trees: Spiritual Guide, Wind Master, Mechanician, Wildling, and Physicist. A Spiritual Guide increases the Shaman's ability to save more mice, a Wind Master focuses on the Shaman's mobility, a Mechanician gives the Shaman more options when it comes to building, a Wildling enhances both objects and mice, and a Physicist increases the Shaman's power.

Trolling is considered a part of the game, as stated in the in-game 'Game Rules' menu.[11] Some players infrequently decide to troll, whether playing as the Shaman or a normal mouse. Shamans can kill other mice by striking them with cannonballs and other objects, creating structures that causes lag to other players, as well as blocking them from progressing in the map by building a structure that is impossible to pass. Normal mice can troll by stalling, which is to stay on the map for as long as possible without capturing the cheese. Normal mice may also choose to push the Shaman's buildings off the stage. In maps where there is collision detection, they can also push other mice, including the Shaman, off the stage. Trollers can also use the in-game consumables to make a shaman build go haywire or slow down mice. Common consumables used are tombstones, pufferfish, balls, snowballs, jack-o'-lanterns, chickens, paper planes, paper balls and energy orbs.

Game modes[]

Transformice has several game modes, each with different mechanics and objectives.


This is the "normal" mode of Transformice. The mechanics of this mode are described above. A round may also occasionally feature a racing map.


Vanilla is very similar to Transformice. This mode only features administrator-created maps and maps chosen from map creation events, which are considered easier for beginners to complete.


In this mode, the shaman attempts to kill the mice, mainly by using cannonballs, or other summoned objects. In this mode, there aren't any mouse holes, but there is cheese in some maps to make it harder to move. The mice try to avoid the cannonballs and stay alive by the time the round is over. Sometimes, this mode features "vampire" maps. These maps have no shaman. A few mice are randomly selected as the vampires. The vampires attempt to "infect" other mice, while the mice attempt to stay away from the vampires. After a mouse has been infected, it also becomes a vampire, helping its comrades to infect other mice.


Racing mode has no shaman whatsoever. Mice try to complete maps as fast as possible; they sometimes make use of shortcuts. Returning to the hole first awards progress to certain badges and titles.


Bootcamp levels are very hard, designed with experienced players in mind.


In this mode, the map scrolls horizontally, and mice must keep up with it. There are points distributed on the map, and mice must collect as many as possible before gathering cheese and entering the hole. There is no shaman in this mode.


This mode hosts user-created games of multiple genres coded in the programming language Lua. There are over 40 official modules and over 70 semi-official modules. Players can earn shop cheese in official modules.


There is no objective in this game mode. The map is made to look like a village, with several NPCs distributed throughout. The NPCs stay stationary, and users can buy items, titles, or badges from them using "coins" or other items. Players use the village to chat, roleplay, or trade.


The game was developed by Melibellule (real name Mélanie Christin)[12] and Tigrounette (real name Jean-Baptiste Le Marchand).[13][14] The two met at work and became friends. The idea for Transformice came about when the two decided to team up and create a game together. Tigrounette had experience making games in the past and wanted Melibellule's artistry experience to help in creating the visuals. Melibellule pitched the idea of a little mouse who had to grab a piece of cheese and bring it back to the mouse hole as quickly as possible.

Before Transformice, Tigrounette had worked on another online flash game in April 2008 titled Aaaah!. The object of the game was to control a stick figure-like character through a silhouetted map to reach a pharmacy. The game had similar mechanics to Transformice, in that multiple players were competing for the same goal while one player with the most points was designated as a guide and could draw pathways to help the other players reach the goal. The game also has a map editor.

After quitting their jobs, Melibellule and Tigrounette founded the independent gaming company Atelier 801 as co-CEOs, and later published games Run for Cheese!, Bouboum, Nekodancer, Fortoresse, Dead Maze and Tomb Rumble.[2] A sequel called Transformice Adventures is in development.[15][16][17]


The game is recognized by Kotaku,[18] Rock, Paper, Shotgun,[19] and PC Gamer.[20] In 2010, GameOgre recognized the game as the best browser game of the year.[21] The game has also received a People's Choice Award in Mochi Media's Flash Gaming Summit 2011.[22] The game has been nominated for the 2012 indie game of the year and is under the top 100 indie games of 2012.[23][24] In 2018, Pedestrian.TV recommended the game.[25] In 2020, Game Rant ranked the game fourth in a list of best online multiplayer games that nobody is playing.[26]


  1. Onur Guner, Osman (2019-09-28). "Yılların İnternet Fenomeni 'Transformice' Nasıl Oynanır? (How to Play 'Transformice', the Internet Phenomenon of Years?)" (in tr). 
  2. 2.0 2.1 "Atelier 801 company". Mod DB. DesuraNET Pty Ltd.. 
  3. Agahnon (23 January 2015). "Les souris de Transformice s'installent sur Steam" (in fr). 
  4. Forsans, Emmanuel (2012-02-08). "Transformice (Atelier 801) fête ses 10 millions de comptes (Transformice celebrates its 10 million accounts)" (in fr). 
  5. "Transformice fête ses 10 millions de comptes (Transformice celebrates its 10 million accounts)" (in fr). 2012-02-20. 
  6. Christin, Melanie; 2015 (2015-05-27). "The Story of Transformice: the 60 million players indie game" (in en). 
  7. "Story of an Indie Game with 70 Million Players: A 'Transformice' Postmortem". 2017. 
  8. "Transformice Adventures". 
  9. "Version 1.159: Divine mode!". 2014-05-27. 
  10. "Version 1.82: Shaman skills update!". 2013-06-29. 
  11. "Trolling Is Part Of The Game! discussion on Kongregate". 2010-10-29. 
  12. "Contact information for Melibellule". Archived from the original on 2010-11-15.  (French)
  13. Thuillier, Mathieu (12 October 2011). "« Success souris » pour Transformice ?" (in fr). Nord Éclair. Archived from the original on 6 November 2014. 
  14. "Adobe Flash / Flex & Actionscript: Training & Forums > Viewing profile: Tigrounette laBelette" (in fr). Template:Registration required
  15. "'Transformice Adventures' Launches Kickstarter Campaign, Playable Demo - Trailer" (in en). 
  16. "Action RPG Transformice Adventures launches Kickstarter" (in en-US). 2019-05-07. 
  17. Dawe, Liam (2019-04-26). "Multiplayer action-RPG 'Transformice Adventures' coming to Linux later this year" (in en). 
  18. McWhertor, Michael (2010-06-21). "Transformice Is Pure Mayhem, Everyone Should Play It". Kotaku. 
  19. Gillen, Kieron (2010-06-22). "Boomtown Rats: Transformice". Rock, Paper, Shotgun. 
  20. McDougall, Jaz (2010-06-21). "Browser game: Transformice". PC Gamer. 
  21. "2010 Online Game Awards - The Best MMO Games of 2010". GameOgre. 
  22. "'Crush the Castle 2′ takes home two Mochi Awards at Flash Game Summit 2011". 2011-02-27. 
  23. "Top 100 - 2012 Indie of the Year Awards - Indie DB". Indie DB. DesuraNET Pty Ltd.. 
  24. "Transformice! ≫ Vote for Transformice on "Indie Games of the Year"!". 
  25. "Free Online Games You Can Play In Your Browser That Won't Fuck Up Dad's PC" (in en-US). 2018-11-27. 
  26. Bowen, Thomas (2020-11-13). "The 10 Best Online Multiplayer Games That Nobody Is Playing" (in en-US). 

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