This is a template Unity project Omiya Games uses to start their game project. In this Unity project, the following folders has the following roles: Assets: A folder required by Unity. Contains assets used for the game. See the README.txt in the folder for more details. ProjectSettings: A folder required by Unity. Contains settings for Unity. Builds: A folder where its contents are ignored by Mercurial. Typically where game builds are created in. UnimportedAssets: A folder that Mercurial versions, but Unity doesn't detect. Typically where unfinished art assets are placed in. Library: A folder required by Unity. It's contents are very cryptic and mysterious. I wouldn't recommend touching it. Ignored by Mercurial. Temp: A folder used by Unity. Unity creates it when an editor opens. I wouldn't recommend touching it. Ignored by Mercurial.