Physic Game Engine compatible with Blender

Game Engine Game Engine Support and Discussion
1

Hey Guys, quick question; Is there a physics game engine, such as a Digital Molecular Matter, or Euphoria, which is compatible with Blender?

2

Bullet2 is the one that is integrated in BGE.

I do not think there are other Physics engines interfaces available.

3

I suppose you could implement other physics engines if they were Python based (you could then import them into your game).