Split/Second Cheats

Unlock Disney XD car
1) From main menu click the options tab. 2) When in the options menu, enter the code using the buttons and the D pad on the controller. 3) After you enter the code the car should be in the garage.

Unlock Disney XD car: X, Down, X, Down, X, Down

AMX Car
At the options menu input this code using the analog stick or the D-Pad, while using the face buttons(A,B,X,Y). (I did it on the "Split Screen" option).

Unlocks the AMX version of the Coyote for use in Quick Play.: Left, X, Left, X, Left, X, Left, X, Left, X, Left, X, Right.

Computer Spelie Car
At the options menu input this code using the analog stick or the D-Pad, while using the face buttons(A,B,X,Y).

Unlocks the Spelie car for use in Quick Play.: X, Up, X, Up, X, Up, X, Up.

Achievements
Beat The Team (25): Beat 1 minute 7 seconds on Construction Site in Detonator.
Beat The Team II: The Revenge (25): Beat 1 minute 18 seconds on Power Plant in Detonator.
Clear Skies (10): Win your first Season Air Revenge event.
Eliminator (10): Win your first Elimination event.
Giant Killer (25): Beat an opponent with an online form of 10 or better.
Going The Distance (30): Drive a total of 1,081 miles.
Great Explorer (30): Trigger a total of 50 route changer Power Plays.
Heavyweight (25): Wreck 1000 rivals with Power Plays.
High Five (25): Spend a total of five minutes airborne.
I Have The Power (5): Trigger your first Level 2 Power Play.
In Good Form (10): Get an online form of 75 or better.
Keep On Truckin' (10): Win your first Season Survival event.
Leading The Way (50): Win every Bonus Round.
Made The Podium (40): Complete the Season Championship.
Moving Ahead (25): Win 6 Bonus Rounds.
On The Run (10): Win your first Season Air Strike event.
Out Of Reach (25): Get an online form of 25 or better.
Perfection (130): Complete every event and Season Championship race in first place.
Power Up (5): Trigger your first Level 1 Power Play.
Qualifier (10): Qualify for the first round of the Season Championship.
Race Winner (10): Win your first Race event.
Right On Track (10): Win your first Bonus Round.
Season Champion (80): Complete the Season Championship in first place.
Start Me Up (10): Win an online event.
Survivor (25): Complete round six of the Season Championship.
The Time Is Right (10): Win your first Season Detonator event.
Winner (20): Win a round of the Season Championship.
World Beater (50): Get an online form of 1.