Ego 2.0 is the game engine used in Dirt 3. It's an improved version of Ego 1.0 or also known as Ego.
The video game engine was developed by Codemasters.
Ego is a modified version of the Neon game engine that was used in Colin McRae: Dirt and was developed by Codemasters and Sony Computer Entertainment using Sony Computer Entertainment's PhyreEngine cross-platform graphics engine.
The Ego engine was developed to render more detailed damage and physics as well as render large-scale environments.