Using the engine

With the exception of Battlefield 2: Modern Warfare, which uses the RenderWare engine, all other Battlefield games use engines developed in-house by EA DICE.

Refractor 2
The Refractor 2 engine is an improvement on Refraction's Refractor engine, which DICE used as the basis for developing the Refractor 2 engine for Battlefield 1942 and Battlefield: Vietnam.
The Refractor 2 engine was significantly improved with new technologies and effects, i.e. it became the engine for four games, Battlefield 2, Battlefield 2142, Battlefield: Heroes and Battlefield: Play4Free.