Unlock Crushing Difficulty SettingAdded 28 Jan 2008, ID #413
This is the most difficult setting in the game and is unlocked by completing the 'Hard' difficulty setting in ALL 22 chapters of the game (this must be accomplished without changing to a lower difficulty on any of the chapters). When you have completed this task start a 'New Game' and the option for the 'Crushing' difficulty setting will be available for selection.
Unlock Drake's Baseball T-ShirtAdded 22 Jan 2008, ID #405
During gameplay pause the game and at the 'Pause' screen select 'Bonuses' and then the 'Rewards' option and press Left, Right, Down, Up, Triangle R1, L1, Square and Drake's Baseball T-Shirt will become unlocked.
When you are climbing the cliffs to get into the u-boat when you get ahold of a Vine that you can climb go up and thre should be a treasure then when you get on the u-boat there is a treasure at the tip of the boat.