Use the following trick for adrenaline combos using little adrenaline. When you are about to attack with your electric baton, turn on your adrenaline and start to attack. When you land the first hit, turn off adrenaline and continue to attack. You will notice that you attacked with your adrenaline combos.
Control introduction sequence
During the opening screens, press L and R to zoom in the image in the background.
Easy Kills
Aim for a terminator's head while in battle. If you shoot its head, it will pop off, and you will get a lot of Skynet Tech points. Sometimes when you shoot its head off, it will run around shooting its gun in the air and then explode.
Easy Skynet Tech points
While zoomed in, aim for the neck of most enemies and their heads will pop off. Each head is worth Skynet Tech points.
Game Intro Option
Successfully complete the level 1 under the medium difficulty setting to unlock the 'Game Intro' in the 'Bonus Material' screen.
Hint
To kill the first guardian in level 10 take your multi-caster out and shoot it rapidly. If it runs out of bullets switch to EGM Generator and stun him. Then switch to R6pak and shoot it a few times then it will die.
Hk Recon Threat Data
Get four medals to get the HK Recon threat data option.
T-400 Threat Data
Finish all the training missions under the time limit, then press L at the mission complete screen to see what you have unlocked.
T800 Threat Data
Get four medals on level 3. This can be quite difficult because your character gets hit all the time and it is hard to dodge the enemies. Go to 'Awards' to check what medals you received. This was the cyborg from in T2: Judgement Day and The Terminator.
Turret gun zoom
When you get to use a turret gun in certain parts of a level, click Left Analog-stick to zoom in 3x. This will help you see what you are shooting at, and result in better aim.
Zoom
On most weapons, you can zoom in by 3x pressing R.