Thunder Wolves achievements

Kill 100 enemy helicopters.

Complete the 'Stomp The Snake' mission on expert difficulty level in co-op mode.

Find and eliminate Pedro in all locations.

Get all stars in all missions.

Collect all 25 crates hidden in various locations.

Kill 10 vehicles by smashing into them.

Purge the island of the dead.

Locate and winch up the Lost Ark.

Complete at least one mission with each helicopter.

Kill a boss/miniboss by smashing into it.

Complete a (non-tutorial) mission in 8 minutes or less.

Complete a (non-tutorial) mission using only rockets.