Lionhead Studios Easter Egg
In the side quest "Treasure Island of Doom", the Lionhead Studios Lion can be found once you get to the treasure island. Look at the island in the middle of the lake and it is in the shape of the Studio's Lionhead logo.
Contributed By: Oscar8908.
Infinite Experience II
Wait until your character is at least somewhat leveled up. Plug in a second controller and begin a co-op game without using a second profile. Using the second controller, go to your henchman's abilities and discard all of them, returning the experience to the pool. Then quit out of the co-op game. You should find that all the "leftover" experience has been transfered to your hero. Repeat ad nauseum. *Note: Your co-op henchman will have the same abilities that you do, so the stronger the hero the more abilities there are to sell off and thus more experience.
Contributed By: BloodOfOsiris.