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Complete Boot Camp.
Defeat the first boss.
Defeat the second boss.
Defeat the third boss.
Defeat the fourth boss.
Complete adventure mode on easy.
Complete adventure mode on normal.
Live to Fly another day.
Pay the ultimate price.
Collect every coin in a level (excluding bonus area coins)
Collect every coin in every level (excluding bonus area coins)
Complete the SpeedRun mode and post a time to the leaderboard.
Collect all the hidden items.
Master one level.
Master all levels.
Complete the RageQuit Rex mode.