Level select:
At the 'Press Start' screen, press , Right, Right, , Down, . This does NOT unlock levels in Road Trip, only the other modes.

Boston level in Road Trip:
At the 'Press Start' screen, press , Up, Down, Down, Up, .

Chicago level in Road Trip:
At the 'Press Start' screen, press , Up, , Up, , .

Las Vegas level in Road Trip:
At the 'Press Start' screen, press , R1, Left, L1, Right, .

Los Angeles level in Road Trip:
At the 'Press Start' screen, press , Left, , , Left, .

New Orleans level in Road Trip:
At the 'Press Start' screen, press , Down, Right, Up, Left, .

Portland level in Road Trip:
At the 'Press Start' screen, press , , , , , .

Elvis costume:
At the 'Press Start' screen, press , L1, L1, Up, Up.

BMX costume:
At the 'Press Start' screen, press , , Left, Right, Left, .

Tiki Battle mode:
At the 'Press Start' screen, press L1, L1, Down, R1, , L1.

Play as Day Smith:
At the 'Press Start' screen, press , Up, Down, Up, Down, .

Play as Vanessa:
At the 'Press Start' screen, press , Down, Left, Left, Down, .

Play as Big Foot:
At the 'Press Start' screen, press , Right, Up, Right, Up, .

Play as The Mime:
At the 'Press Start' screen, press , Left, Right, Left, Right, Left.

Play as Volcano:
At the 'Press Start' screen, press , Up, Up, , Up, Up, .

Big Foot's FMV scenes:
At the 'Press Start' screen, press R1, Up, Down, Left, , , , R1.

Cory Nastazio's FMV scenes:
At the 'Press Start' screen, press R1, , , , , , , R1.

Day Smith's FMV scenes:
At the 'Press Start' screen, press R1, , Left, Left, , Right, Right, R1.

Joe Kowalski's FMV scenes:
At the 'Press Start' screen, press R1, Up, , , Down, R1.

Kevin Robinson's FMV scenes:
At the 'Press Start' screen, press R1, , , Down, Up, R1.

Mat Hoffman's FMV scenes:
At the 'Press Start' screen, press R1, Left, , Left, , Left, R1.

Mike Escamilla's FMV scenes:
At the 'Press Start' screen, press R1, , , , , , , R1.

Nate Wessel's FMV scenes:
At the 'Press Start' screen, press R1, Down, , , Down, , , R1.

Ruben Alcantara's FMV scenes:
At the 'Press Start' screen, press R1, Left, Right, Left, Right, Left, Right, R1.

Rick Thorne's FMV scenes:
At the 'Press Start' screen, press R1, L1, Right, R1, Left, R1.

Seth Kimbrough's FMV scenes:
At the 'Press Start' screen, press R1, Up, Up, , , , R1.

Simon Tabron's FMV scenes:
At the 'Press Start' screen, press R1, L1, L1, R1, L1, L1, R1.

All music tracks:
At the 'Press Start' screen, press L1, Left, Left, Right, Right, Right, , .

Adrenaline Moves:

Cory Nastazio
Back Flip Tabletop X-Down: Press Up, Left, . 
Back Flip Tailwhip: Press Right, Left, . 
Half Barspin Tailwhip: Press Left, Right,  

Day Smith
Back Flip One Footer: Press Left, Right, . 
Decade Air: Press Right, Left, .
Pendulum: Press Left, Down,  

Joe Kowalski
Half Barspin Tailwhip: Press Up, Left, . 
No Footed Candybar One Hander: Press Right, Left, .
Superman One Hander: Press Left, Right,  

Kevin Robinson
Pendulum: Left, Right, .
Rocket One Footer Candybar: Right, Left, . 
No Handed Backflip: Down, Right, . 

Mat Hoffman
Back Flip Tailwhip: Press Right, Down, . 
Barhop: Press Right, Left, .
Peacock: Press Left, Up,  

Mike Escamilla
Back Flip No Footer: Press Left, Right, . 
Body Varial: Press Right, Up, .
Decade Air: Press Right, Left,  

Nate Wessel
Back Flip No Footer: Press Right, Left, . 
Pendulum: Press Left, Right, .
Superman Double Seat Grab: Press Down, Left,  

Rick Thorne
No Hander Backflip: Press Down, Right . 
One Handed Swing Leg: Press Right, Left, . 
Rocket One Footer Candybar: Press Right, Left,  

Ruben Alcantara
Decade Air: Press Left, Right, . 
Double Tailwhip: Press Down, Left, . 
Superman One Hander: Press Right, Left,  

Seth Kimbrough
Barhop: Press Left, Right, .
Superman Seat Grab Truckdriver: Press Right, Down, .
Swing Leg: Press Left, Right,  

Simon Tabron
900: Press Left, Down, .
Double Front Peg Grab: Press Right, Left, . 
Swing Leg: Press Left, Right,  

Vanessa
Barhop: Press Up, Left, .
Rocket One Footer Candybar: Press Left, Right, . 
Swing Leg: Press Right, Left,  

Volcano
Back Flip No Footer: Press Left, Right, . 
One Hander Swing Leg: Press Down, Right, . 
Rocket One Foot Candybar: Press Right, Left, 

Bigfoot
Backflip No Footer: Press Right, Left, . 
Superman One Hander: Press Left, Right, . 
Decade Air: Press Left, Up, .

Thanks to Revolution readers Rudy, Lance, Jeremy, and L-EmentSk8er!