X2: Wolverine's Revenge Unlockables

By pulling off a predetermined amount of stealth moves you will receive medals (dog tags). With the medals more maneuvers and cooler attacks become unlocked.

You will see the word STRIKE when a stealth move can be performed. This option will not present itself too often so utilizing it when possible is advised. Crouching and moving on all fours is the best way for moving around undetected.

While playing the game you can find a variety of comic book covers. You cannot look at these covers directly but the covers will unlock Tips & Tricks costumes. For instance, you can find the X2 movie costume in Act 3 Part 3 after conversing with the scientist in the operating room and going to the lower level of the room to receive the clothing.