...or simply place it in WED in the level and change the angle of the sprite by a angle, at least a small one. The engine recognizes it as one that shall not turn to the player.

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt