The following playsets can be unlocked by performing the actions below.

Unlockable	How to unlock
Creator	Complete Kingdom of the Crystal Skull - Part 1.
Kingdom of the Crystal Skull - Part 2	Beat Kingdom of the Crystal Skull - Part 1.
Kingdom of the Crystal Skull - Part 3	Beat Kingdom of the Crystal Skull - Part 2.
Raiders of the Lost Ark	Beat Kingdom of the Crystal Skull - Part 1.
Super Bonus Levels	Complete a Super Bonus Level.
Temple of Doom	Beat Raiders of the Lost Ark.
The Last Crusade	Beat Temple of Doom.