What is a PHYSICS file? A PHYSICS file is a game data file used by Age of Empires III: Definitive Edition to store information about the physical properties of in-game objects. It defines how objects behave in the game world, including mass, friction, movement constraints, and collision response. The game references PHYSICS files and other game data, such as .HKSHAPE shape files and .FBX models, to generate realistic interactions during gameplay.

More Information The PHYSICS format is proprietary and closely tied to the Havok physics engine, similarly to the HKSHAPE format, which the game uses to simulate real-world physics in its 3D environment. PHYSICS files contain parameters that control the engine's calculations, helping the game determine how objects fall, slide, bounce, or collide.