While playing the game, press X, A(2), X, Y(2), X, B(2), X, click Right Analog-stick. If you entered the code correctly, you will hear a sound. Although you will lose health you cannot die. Note: This code prevents achievements from being unlocked. To prevent this from happening, enable the code, then quit to the main menu. Select "Continue" or "Replay Mission", and you will now be able to unlock achievements with the code enabled.
While playing the game, press Y, X(2), Y, B(2), Y, A(2), Y, click Right Analog-stick. If you entered the code correctly, you will hear a sound. Note: This code prevents achievements from being unlocked. To prevent this from happening, enable the code, then quit to the main menu. Select "Continue" or "Replay Mission", and you will now be able to unlock achievements with the code enabled.
While playing the game, press A(2), X(2), Y(2), B(2), Y(2), X(2), A(2), click Right Analog-stick. If you entered the code correctly, you will hear a sound. You will gain double reflex with every kill. Note: This code prevents achievements from being unlocked. To prevent this from happening, enable the code, then quit to the main menu. Select "Continue" or "Replay Mission", and you will now be able to unlock achievements with the code enabled.
While playing the game, press A, X, B, X, A, Y, A, Y, A, X, B(2), X, click Right Analog-stick to unlock Wolverine's classic blue and yellow costume. If you entered the code correctly, you will hear a sound. Then, exit to the main menu, and switch costumes.
Successfully complete the game to unlock the Hard difficulty.
Successfully complete the indicated task to unlock the corresponding costume:
After you crash the jeep on the first level and continue, you will reach an area with a barricaded gate. Climb over the rocks, and go in. Defeat the enemies. Look for some boards over a small doorway off on one of the areas. Slice them up, and enter to find the hatch on the ground near the back corner and get the "Found!" achievement.
There is a part in the Sentinel factory where you must freeze yourself to get past a heat detector. Move a teleporter all the way to the right. It will go through the wall and enter a secret room. Teleport there to collect the cake that is inside and get "The Cake" achievement.
When falling during the Boss battle with the Sentinel, destroy the second turbine on the Sentinel's back. Fly through the large O-ring that falls off at the correct moment to get the "Threading The Needle" achievement.
Go to the Alkali Lake section of the Frozen Tundra (before the Agent Zero fight). Immediately after the long road section with the shield troops is a fallen tree. Enter the forest that leads to a cave. Inside will be the sword and skeleton.
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
Additionally, there are eleven secret achievements: