cutting off meshes in the bge (bad) when i start my game in the bge, a plane is overlapping objects and they get closer when moving, but the part that the plane is extended to, is the part at the foremost of everything.
Go to the material settings.
Disable Backface Culling to see both sides of the material faces.
Set the Alpha Blend option to Alpha Clip (recommended) or Alpha Sort to fix the overlapping faces.