Hint :
Faster Turns:
To turn around instantly, type "rotate" while playing.
You may now press BACKSPACE to turn around at any time.

Open Sesame:
When you start your game in the ampitheatre head straight for
the locked door room on the left (with the red light).
Walk in and you will see the door if you press the space bar it
will say it is locked. Type in "opensesame" and you will be able
to walk in (go straight through the door). In there is a dark room with a couple of power-ups and bad guys. P.S. If you typed it in once it will stay like that even after you exit and enter the game!

Shot Accuracy:
During gamplay type "STAT" and press F9 and you will see you
statistics on your aim!