No missable achievements (plus 27 unknown)
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Completed the Golden Temple
Completed the Tower of Nannar
Collected all golden skulls
Found the Key of Serpentis
Unlocked Space Marine Aban
Completed every stage of the main game as Aban Hawkins with a cumulative time of less than 30 minute
Completed Antarctica
Completed the Lost Levels
Unlocked every character and costume
Purchased every unlockable in Conseil's Duty Free