Kill boss
ACH_KILL_BOSS1.5%

Achievements and their recorded unlock rates.
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ACH_KILL_BOSSACH_FOR_GLORYACH_INFLUENTIAL_LORDACH_CONQUERORACH_SPELL_MASTERACH_WEAKNESSACH_AMBITIOUSACH_TRIGGER_SOMETHINGACH_THE_BESTACH_IT_WAS_CLOSEACH_GOOD_BUSINESSACH_RICH_MANACH_IHAVE_A_CHOICEACH_LONG_ARMSACH_PROFESSIONALACH_DROP_OF_BLOODACH_DEFENDERACH_TACTICIANACH_MAGICIANACH_SUPER_HERO