After completing the game, start a new game in headshot mode (for dr. lobotomy), time attack mode (for catch me if you can) or close combat mode (for butcher would be proud) and complete the first two scenes of the first level. When the third scene loads, quit to the main menu. Go to "Unlocked Acts" and select the last level using any character and the same difficulty you started the new game with. You can use cheats on the last level to easily get new trophies.
Unlock the following cheats by entering the corresponding codes at the "Secret Codes" screen. To enable a cheat, pause the game and go to the "Game Enhancements" menu. Then, select the cheat you want to enable. Note: When a cheat is enabled, the chapter you are playing will not be available for replay after the game is completed:
After getting enough adrenaline to perform an enhanced quick movement, equip the Fire Eater machine guns. Perform the enhanced quick movement when The Immortal is running from cover. When he disappears, switch to the powerful pistol and take out his men to get adrenaline. Repeat the process until he is killed.
Complete the first act, then quit to the main menu when mission 2 starts. Go to the chapter selection screen and select chapter one, then enter the cheat menu and enable anything desired. Note that a bug will appear in the top left corner. Start game play and continue until that bug disappears, indicating that the cheats are no longer active. Return to the cheat menu and turn the desired cheats back on, then return to the main menu. Choose "Resume" and you can now complete the game with the cheats active. The bug will no longer appear to indicate that they are active, and you will still unlock the trophies.