Instructions
Fight your way through to Chapter 2: Alkalai Lake and take out all the guards and obstacles in your way to make it to the segment where Wolverine is in the generator room, pinned down by sniper fire from an overhead walkway. Use lunge attacks to take out all the ground troops, periodically stepping behind adjacent walls to allow Wolverine's healing factor to bring you to full health.
Run up the steps leading to the sniper's catwalk, which triggers a cut scene of him fleeing into the next room. Take out any guards that emerge to cover the sniper's retreat and look to your left; there's a long walkway that extends along the left wall. Follow it all the way to the end and look behind the last generator in the alcove to find the first X-Force Wolverine statue.
Continue through the game to reach Chapter 3: Cybernetics Lab 1. Battle your way through to reach the cryogenic freezing chamber and look above the teleporting portal to find a small climbable ledge. Jump up and grab the edge, then pull yourself up. The second X-Force statue is against the rear wall.
Fight your way to Chapter 4: Mardi Gras. Cross the bridge in the construction area once you come across it. Ride the elevator up to the next floor and deal with the assassins that greet you -- as always, lunges work best with them because of their agility. Look behind the stacked crates on your right to find the third and final X-Force statue.
Save the game and exit to the main menu. Under "Options," select "Costumes," where the X-Force costume will be listed as available. However, unlike the classic costume that was a "freebie," you'll have to fight X-Force Wolverine in the simulator to unlock the ability to wear the costume in your current game. Successfully beat him and the costume will be ready for you to select in-game.