How do you get all the costumes in star war force unleashed 2?

In "Star Wars: The Force Unleashed II," you can unlock costumes by completing various in-game challenges and achieving specific milestones. Each costume requires you to accomplish tasks such as defeating a certain number of enemies, collecting holocron shards, or finishing the game on different difficulty levels. Additionally, some costumes are available through DLC or pre-order bonuses. Check the game's menus for specific requirements for each costume.