Enemy trace and quick turn on 180 degrees

For the first, you can try with rotationrate.yaw, in the pawn class. Use “focus” to point to the player, then rotationrate.yaw control the velocity.

For the second, I don’t understand very well, but you can use dot product to get the orientation between pawns, or vsize. Perhaps this helps you: Legacy:UnrealScript Vector Maths - Unreal Wiki