A 2d & 3d game engine made by Unity Technologies.

It's designed for extensive scalability with support for all major platforms, meaning it's possible (within a reasonable limit) for the same game to be run on Mobile, Consoles and PCs. Games are usually coded in C#, although JavaScript is also supported.

It's scalability, along with extensive documentation and relative ease of use makes it [i]the[/i] most used engine in the market.

Note that this tag is used mostly by Unity-chan (Real Name: [[Ootori Kohaku]]), the mascot character created by Unity Technologies Japan to represent the engine.
unity (game engine)