Static Physics Object Type

Static objects in the Blender Game Engine do not automatically react to physics, including gravity and collisions. Even if hit by the force of a speeding 18-wheeler truck, it will remain unresponsive in terms of location, rotation, or deformation.

It will, however, give collision reactions. Objects will bounce off of Static Objects, and rotational inertia will transfer to objects capable of rotating (that is, Rigid Body Objects will spin in response, though Dynamic Objects will not).

Note that none of this prevents you from transforming the Static Objects with Logic Bricks or Python code. The visual objects will correctly move and their physics representation will update in the engine as well.

Another important note is that the default Collision Bounds is a Triangle Mesh, meaning it is higher in computational requirements but also in detail. This in turn means the "Radius" option has no effect by default.

In the example game demo, Frijoles, the Static type is represented by the "Arena" object that holds all the moving bits.

For more documentation, see the Top BGE Physics page.