Kill a boss/miniboss by smashing into it.
Kill 10 vehicles by smashing into them.
Complete a (non-tutorial) mission in 8 minutes or less.
Complete at least one mission with each helicopter.
Destroy 1,000 buildings.
Score at least 500,000 points in a single mission.
Complete a (non-tutorial) mission using only rockets.
Kill two enemy vehicles with one rocket.
Destroy your chopper with your own guided rocket.
Complete a (non-tutorial) mission using only the machine gun.
Complete the first main mission objective.
Collect all 25 crates hidden in various locations.
Locate and winch up the Lost Ark.
Complete all levels at least normal difficulty.
Get all stars in all missions.
Purge the island of the dead.
Find and eliminate Pedro in all locations.
Kill 100 enemy helicopters.
Complete a mission in co-op mode.
Complete the 'Stomp The Snake' mission on expert difficulty level in co-op mode.
