Enter the following button presses at the Main Menu. At this time we do not have confirmation on what each code does, but it will unlock Level Select, all movies, dog tag challenges, costumes, production art and enable the Cheat Menu at the pause screen where you can toggle Invulnerability.
Cheat #1: BXBYYYLLZ
Cheat #2: BXBYYYRRZ
Cheat #3: BXBYBXLRZ
Cheat #4: BBXXYYXXLLRRZ
Fight Sabretooth for awhile, wait until the tanker appears and then try and flip over Sabretooth and when Strike appears throw him headfirst into the tanker. Do this three times and you will defeat him. Once he is defeated, walk over to him, Strike will appear, throw him into the glass booth (automatically) and you will end the boss fight and earn an all Level Security Pass.
Act II Level I
Immediately turn around and head in the opposite direction, run up the slight incline and jump over the edge (the fall won't hurt you). At the bottom, turn left around the corner and run almost straight towards a tall building with windows at the top. At the front of that building, you will find a ladder. Press the appropriate button to climb to the top, and use your claws to bust through the windows. You will find an health icon inside. Go back outside (on the same side as the ladder) and look to the right (if you are facing the ladder). You will see a chain link fence. Go through it and then go through the next chain link fence. You will be at the power generator. Stand in front of the generator with a tear in it, and press the appropriate button to activate things (B on Xbox). Wolverine will take damage, but with the health pick up, he will not die. This will activate the generator. The large gate will be unlocked, but you won't be able to approach it from the front. Sneak around to the left of the now open gate and enter from the left. Once inside make your way around to the room that has a cracked wall and a container in front of it. Attack the container and the wall will blow apart. Inside this next room will be the Comic Book Icon for the Classic Yellow and Blue costume.
100% health Act II Level I
Locate the health icon in the building as explained above and you will receive approx. 50% health. Instead of starting the generator, go to the bridge (across from the generator) and jump across the gap. You will see an enemy slip near the back of the truck. Go around the side of the truck, while using your senses (but be quick). As you approach the enemy in Senses mode, you will activate a Strike mode. Press the appropriate Strike mode button for the console you are playing on and Wolverine will throw the guard through the box in the truck and earn him a Strike bonus as well as another 50% health icon. Now the level will be much easier to complete.
Dodge the falling ice. Wendigo will run at you. Keep running away from him till he stops and immediately run behind him and hit him once or twice till you get the strike effect available. Hit Circle (on PS2, B on Xbox) and Logan will throw him (make sure to spin the left analog to build momentum).Keep repeating until he finally dies