Unlock the following monster trucks by performing the corresponding tasks:

TRUCK - HOW TO UNLOCK .
Brutas - Finish first in the event against Brutus.
Grave Digger - Finish first in the National Tour event.
Grinder - Finish first in the Minneapolis Circuit race.
Jurrasic Attack - Finish first in the race against Jurassic Attack.
Maximum Destruction - Finish first in the Indianapolis Stadium race.
Monster Mutt - Finish first during event against Monster Mutt.
U.S Air Force After Burner - Finish first during event against the U.S Air Force After Burner.
Unlock all Monster Trucks - Reach level 20 of your experience point upgrades.

Unlock the following bonuses by reaching the corresponding experience levels:

BONUS - EXPERIENCE LEVEL
All areas, Freestyle, Circuit Race, Time Crunch, Stadium Race, Gate Rush, Team Events, and Stunt Events - Experience level 20.
All custom accessories - Experience level 20.
All custom decals - Experience level 20.
All custom vehicle body types - Experience level 20.
All vehicles chassis upgrade - Experience level 5.
All vehicles chassis upgrade x2 - Experience level 10.
All vehicles chassis upgrade x3 - Experience level 20.
All vehicles engines upgrade - Experience level 5.
All vehicles engines upgrade x2 - Experience level 10.
All vehicles engines upgrade x3 - Experience level 20.
Nitro upgrade for all trucks x2 - Experience level 10.
Nitro upgrade for all trucks x3 - Experience level 20.
Nitro upgrade for all trucks - Experience level 5.