On Hardened or Veteran difficulty, complete a level without dying. (Solo only)

Complete the game on any difficulty. (Solo only)

Kill 3 enemies with a single round.

Kill 8 Japanese with thrown mortars in 'Breaking Point.

Survive a banzai attack. (Solo only)

Radio in a naval bombardment that kills at least 4 Japanese soldiers.

You completed a 500 foot wheelie on a motorbike.

You completed all 10 package delivery jobs.

You beat a friend at pool.

You scored 180 with 3 darts.

You unlocked the special ability of Roman's taxi.

You have completed the first mission.

Collect 25% of the prize bubbles on the story levels