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. If you entered the code correctly, the name of the cheat will appear.

Note 1: Killed enemies will drop Studs.

Note 2: Animals will defecate Studs.

Note 3: This code unlocks the following secret playable characters in Free Play mode. Santa in the "Into The Mountains" level; Dancing Girl 2, Thieving Hoodlum 1, and Thieving Hoodlum 2 in the "Shanghai Showdown" level; Enemy Radio Operator in the "Search For King Richard" level; and Graverobber 1 and Gravrobber 2 in the "Young Indy" level.

Enter one of the following codes on the blackboard in the Math classroom at Barnett College to unlock the corresponding character for purchase:

Collect all the artifacts in the indicated movie to unlock the corresponding secret level:

Raiders Of The Lost Ark: Young Indy level
Temple Of Doom: Ancient City level
The Last Crusade: Warehouse level

Find C-3PO, Chewbacca, Luke Skywalker, Princess Leia, and R2-D2 throughout the game to unlock Han Solo in Free Play mode.

A Red Parcel is hidden in every level. Once it is found, take it to the grey and red postbox hidden nearby. Note: Some postboxes must be assembled. Drop the Parcel in the postbox. When you return to Barnett College, enter the middle door on right side of hall to enter the mail room. You can now purchase the extra bonus that was unlocked by that Parcel.

Get a 100% completion to have Lego Studs rain inside Barnett College.

C3PO: Play the Raiders Of The Lost Ark: The Lost Temple level. Find the room that is sealed off by metal Lego pieces. Use a bazooka or grenade in Free Play mode to reach him.

Chewbacca: Play the Raiders Of The Lost Ark: City Of Danger level. Reach the last area of the mission where you change to a guard and get through the checkpoint where the truck is stored. At the back of that area is a hieroglyphic display. Have a Scholar character complete the puzzle. Go inside the newly opened door to find the Mos Eisley cantina. Chewbacca is behind a fence, and can be reached with a short character such as the Maharaja or Short Round.

Luke Skywalker: Play the Raiders Of The Lost Ark: Into The Mountains level. Search inside the cave somewhere in the mountains. Use a bazooka or grenade in Free Play mode to enter it.

Princess Leia: Play the Temple Of Doom: Free The Slaves level. Go to the second to last room. Go near the machinery on the far right-hand side of the room, then walk toward the screen to find the way down to her.

R2-D2: Play The Last Crusade: Desert Ambush level. When you start, go left, and climb up the mountain to the gold chest. Once you get the chest, follow the ledge to the left. You should see a brown whip point. Use Indy's whip to pull down a tube from a Sandcrawler. R2-D2 will appear from it.