Ammo
If you are down to your last mag or have ran out of ammunition, walk over to Blair, who will supply you with ammunition. This can be done as many times as you like.
How to Kill a Spider, Tip 1
Target on the red eye on a spider's face and shoot it with any weapon you choose. When you have shot the eye, you have about 10 seconds to shoot the battery pack on the spider's back; this will instantly kill the enemy.
How to Kill a Spider, Tip 2
When a spider is attacking, stay in cover for a while. Eventually, it will think you are in a different place in the area. Attack the spider before it turns around and shoot the battery pack on its pack. If you are too late, repeat the maneuver.
Unlocking all "Terminator Salvation" Movies
To unlock all "Terminator Salvation" movies, press the following buttons in sequence on your controller during game play: "Down," "O," "Up," "X," "R2," "R2," "L1," "L1," "Select," "Start," "Start," "O."