Normally using the Undying, Infinite Rage, and Double Reflex codes will block Achievements. However, there is a way to get around that, and still get achievements while using cheats. To do this, select replay mission. You can do this with any level, but the very first one that starts with Wolverine falling is recommended. Enter the cheats desired, then save and quit. Then, either continue current game progress or choose replay mission again. Now, you will have your selected cheats activated and will still get achievements. Note: This must be done with each new session.