Transformice

Transformice is an online multiplayer free-to-play platform and indie game by Atelier 801. Created by French game designers, 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, and on Steam as a free-to-play game on January 30, 2015.