Just look at credits
Deploy mines for the first time
Shoot and takeover an enemy turret
Join a multiplayer game for the first time
Wreck your vehicle
Activate a turret downgrade powerup
Host a multiplayer game for the first time
Get the missile launcher for the first time
Win a game in Single Player
Hit the tires of a driver
Wreck an opponent as a shooter
Hit the windshield of a driver