This module contains the classes that appear as instances in the Game Engine. A script must interact with these classes if it is to affect the behaviour of objects in a game.
The following example would move an object (i.e. an instance of KX_GameObject) one unit up.
# bge.types.SCA_PythonController
cont = bge.logic.getCurrentController()
# bge.types.KX_GameObject
obj = cont.owner
obj.worldPosition.z += 1
To run the code, it could be placed in a Blender text block and executed with a SCA_PythonController logic brick.