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