King of unlockables

Ready for the junkyard

Complete the first stage ('Zeus Sector') at any difficulty level

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Piece of rock

Complete the third stage ('Ethia Ruins') at any difficulty level

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System liberated

Complete the fifth stage ('Turady Deep Sea') at any difficulty level

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Not that difficult after all

Complete the seventh stage ('Van Krist Labs') at any difficulty level

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Survivor

Clear challenge 'Survivor'

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Collector

Clear challenge 'Collector'

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Action Fan

Clear challenge 'Action Fan'

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Chain Expert

Clear challenge 'Chain Expert'

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Profiler

Clear challenge 'Profiler'

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Rating Expert

Clear challenge 'Rating Expert'

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Lucky Number 7

Collect an accumulated total of 77777 chain rings

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Key Explorer

Collect all 35 secret keys in stage one through seven

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Can't hide from me

Shoot down a rare enemy

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Challenge Master

Unlock and successfully pass 12 or more base challenges

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Speed Gunner

Clear challenge 'Speed Gunner'

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Stage Keys

Clear challenge 'Stage Keys'

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Speed Collector

Clear challenge 'Speed Collector'

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Rank Master

Clear challenge 'Rank Master'

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Kill Collector

Clear challenge 'Kill Collector 1'

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Score Collector

Clear challenge 'Score Collector 1'

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Hellfire

Clear challenge 'Hellfire'

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The Last Chapter

Complete the tenth stage ('Inner Core') at any difficulty level

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No time to waste

Defeat the final boss in stage eight in under 115 seconds

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Key Master

Collect all 15 secret keys in stage eight through ten

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