Blender Game Engine (GE).

There are real manual pages hidden INSIDE THE TUTORIAL
http://wiki.blender.org/index.php/BSoD/Introduction_to_the_Game_Engine#Completion_of_the_basic_GE_tutorial !
Videos:
http://blenderartists.org/forum/showthread.php?t=56842

Weapons without scripting:
http://tutorial.jcwcn.com/3D-Graphics/Blender-3d/Basics/2008-12-24/12094.html
Maze game without walls:
http://en.wikibooks.org/wiki/Blender_3D:_Noob_to_Pro/An_aMAZEing_game_engine_tutorial

P:  Rendering is between Frame Render and  Window Render.  Ortho/Persp. and
 view location same as 3D View; but Draw Type always textured.

Sliding:  Must make a material for the sliding object.
    Material subcontext button panel.
    DYN radio.
Turn Friction value WAY DOWN.
Sometimes can cause sliding by making the bounding box something with a flat
 bottom and cranking up the force.

Pause all physics:
import PhysicsConstraints
PhysicsConstraints.setNumTimeSubSteps(0)

SLEEPING
   By default, physics is disabled when a rotating object comes to rest.
    Turn on No Sleeping to leave physics running in this case (see code
    below to waken/sleep proactively).
   I have no idea exactly what the NO SLEEPING button does.
   Here is how to sleep objects in Python:
    owner = GameLogic.getCurrentController().getOwner()
    owner.suspendDynamics()
    //replace suspendDynamics() with resumeDynamics() to wekan

EXECUTABLES
File / External Data/ Pack Into....  (Packs textures into .blend file)
Fie / Save Dynamic Runtime.
On Win, need sdl.dll and python*.dll.
 [In practice, I find that I need a many other *.dll's in the runtime dir, but
 not these two]
On Linux (at least) definitely need /usr/lib64/blender/blenderplayer to Save
 the runtime.  It is missing from the RPM package, but can just add it from
 a tar.bz2 download from Blender.

I had difficulting getting a cube to roll at all.
Seems that this may be possible with the Form setting (for Form Factor).

Anisotropic friction is direction-specific friction settings.  Like, a wheel
decreases friction forwards of backwards and generally increases it sideways.