Is there a cheat code to play as Darth Vader costume in Star Wars force unleashed for Xbox 360?

Unfortunately, there is no cheat code to play as Darth Vader in Star Wars: The Force Unleashed for the Xbox 360. The game doesn't allow you to directly control Vader, although you can use him as a playable character in certain gameplay sections.

However, you can experience playing as Darth Vader through the following means:

* "Challenge Mode": This mode allows you to play as Darth Vader in specific levels with challenges. You can unlock this mode by completing the game once.

* "Multiplayer": In the multiplayer mode, you can choose Darth Vader as a character to play against other players.

* "Mods": There might be mods available for PC versions of the game that allow you to play as Darth Vader throughout the entire game.

It's important to note that mods are typically created by fans and may not work with the Xbox 360 version of the game.