Complete level one
ACH_COMPLETE_LEVEL_ONE25.9%

Achievements and their recorded unlock rates.
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ACH_COMPLETE_LEVEL_ONEACH_MISSION_ONEACH_COMPLETE_LEVEL_TWOACH_MISSION_TWOACH_COMPLETE_LEVEL_THREEACH_MISSION_THREEACH_COMPLETE_LEVEL_FIVEACH_COMPLETE_LEVEL_FOURACH_MISSION_FIVEACH_MISSION_TENACH_MISSION_NINEACH_MISSION_EIGHTACH_MISSION_SEVENACH_MISSION_SIXACH_MISSION_FOURACH_COMPLETE_LEVEL_NINEACH_COMPLETE_LEVEL_EIGHTACH_COMPLETE_LEVEL_SEVENACH_COMPLETE_LEVEL_SIXACH_COMPLETE_LEVEL_TEN