Ben Franklin:
Beat Boston in story mode.

Call Of Duty guy:
Beat story mode on sick difficulty.

Graffiti Tagger:
Beat Berlin in story mode.

Jesse James:
Beat classic mode on sick difficulty.

Jester:
Beat New Orleans in story mode.

Matador:
Beat Barcelona in story mode.

Natas Kaupas:
Beat classic mode on sick difficulty.

Nigel:
Beat story mode on sick difficulty.

Paulie:
Go to Options, then Cheats and enter 4wheeler.

Peds Group A:
Beat story mode on easy difficulty.

Peds Group B:
Beat story mode on normal difficulty.

Peds Group C:
Beat story mode on sick difficulty.

Peds Group D:
Beat classic mode on normal difficulty.

Peds Group E:
Beat classic mode on sick difficulty.

Peds Group F:
Beat 100% of story mode.

Peds Group G:
Beat 100% of classic mode.

Peds Group H:
Clear all the gaps on all fifteen levels.

Phil Margera:
Beat story mode on easy difficulty, or go to Options, then cheats and enter aprilsman.

Ryan Sheckler:
Beat the Skatopia level in story mode.

Shrek:
Beat story mode on easy difficulty.

Shrimp Vendor:
Beat the Australia level in story mode.

Steve-O:
Beat classic mode on normal difficulty.

The Hand:
Beat story mode on normal difficulty.

Original Tony Hawk:
Beat classic mode on normal difficulty setting.

Pro Skater Level:
Beat story mode.

Triangle Level:
Beat classic mode.

Cheats Movie:
Clear all the gaps in every fifteen level.

Neversoft Skates Movie:
Beat 100% of classic mode.

Pro Bails 1 Movie:
Beat classic mode.

Pro Bails 2 Movie:
Beat 100% of story mode.

World Destruction Tour Movie:
Beat story mode.

Natas Kaupas:
Enter "oldskool" at the Cheat menu.

Paulie:
Enter "4-wheeler" at the Cheat menu.

Unlock all Levels:
Enter "d3struct" at the Cheat Menu.

Unlock all Movies:
Enter "boxoffice" at the Cheat menu.

Nigel Beaverhousen:
Enter "sellout" at the Cheat menu.

Phil Margera:
Enter "aprilsman" at the Cheat menu.

Get Alien, Sherk, etc:
Enter "costars" at the Cheat menu.

Infinite Special:
Enter "likepaulie" at the Cheat menu.

Infinite Rail and Lip Balance:
Enter "straightedge" at the Cheat menu.

Easy rails:
Go to Options then Cheats and enter straightedge.

Thanks to Revolution readers Cyrus, Joe-bob briggs, QA Master, Satanic Mechanics, fatima latoya jackson, Rafael Perez, bootleg, javier diaz gonzalez garcia, and Shoshana Serna!