Level 1 Complete 20 Completed Level 1 in any difficulty mode Level 2 Complete 20 Completed Level 2 in any difficulty mode Level 3 Complete 20 Completed Level 3 in any difficulty mode Level 4 Complete 20 Completed Level 4 in any difficulty mode Seasoned Pro 30 Completed all 4 Levels in 'Normal' difficulty mode Grizzled Veteran 60 Completed all 4 Levels in 'Nightmare' difficulty mode Small-Arms Specialist 20 Completed any Level, in any difficulty, using only the Piranha Co-ordinated Fire 20 Completed any Level, in any difficulty, in a 4-player co-op game Jack of all Trades 30 Obtained Rank 5 in all 4 XP categories Master of all Trades 60 Obtained Rank 10 in all 4 XP categories Bathed in Glory 60 Obtained all Awards Juggernaut 40 Within a single session, obtained at least 6 Awards in one Multiplayer round or one Campaign level. Source - X360A
