Rotating Particle Effects

[Your Computer]

Oh, you mean that kind of rotation. I hear if you create a particle system at an entity (or area), you can control the direction of the particle system since it assumes the axis of the entity. However, i have yet to verify this. If it doesn't work, then you'll have to manually edit the particle system each time you want it to face a different direction. Though, Movement -> General -> Coord System might have something to do with it too.