First dose
ACH_FIRST_DOSE95.9%

Achievements and their recorded unlock rates.
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ACH_FIRST_DOSEACH_SECOND_DOSEACH_THIRD_DOSEACH_FINAL_DOSEACH_AIR_DUCTACH_ELEVATORACH_PUZZLE_SOLVEDACH_LOCKED_DOWNACH_CROUCH_911ACH_NO_BOOSTERACH_SPEED_RUNACH_UNSEENACH_CROUCH_1984ACH_DUMPSTER_DIVERACH_HIDE_20ACH_HIDE_50