Complete Level 2 in any difficulty mode

Complete Level 3 in any difficulty mode

Complete Level 4 in any difficulty mode

Complete all 4 Levels in 'Normal' difficulty mode

Complete all 4 Levels in 'Nightmare' difficulty mode

Complete any Level, in any difficulty, using only the Piranha

Complete any Level, in any difficulty, in a 4-player co-op game

Obtain Rank 5 in all 4 categories

Obtain Rank 10 in all 4 categories

Obtain all the Unlockables

Within a single session, obtain at least 6 Awards in one Multiplayer round or one Campaign level.