Use the following trick to get 1 million studs in the unlockable Warehouse level in less than three minutes. Play as a bazooka trooper when you enter the level. Once in the Warehouse, go all the way to the far right-hand side of the level. You will see a big target. Use your bazooka trooper to blast this target repeatedly until you have 1 million studs.
Enter one of the following codes on the blackboard in the Math classroom at Barnett College to unlock the corresponding character for purchase.
Watch the cinematic sequence in part 1 when Indy returns to Barnett College. When all the college students are watching Indy, notice his chalkboard on the upper right. It has "0p1ta5" on it. This is the code for the "Super Slap" cheat.
Enter one of the following codes on the blackboard in the Math classroom at Barnett College to unlock the corresponding option at the "Extras" menu. The name of the cheat will appear to confirm correct code entry.
1. This code unlocks these playable characters in Free Play mode: Santa in "Into The Mountains", Dancing Girl 2, Thieving Hoodlum 1, and Thieving Hoodlum 2 in "Shanghai Showdown", Enemy Radio Operator in "Search For King Richard", and Graverobber 1 and Gravrobber 2 in "Young Indy".
2. Animals will defecate studs.
3. Killed enemies will drop studs.