First boost
ACH_FIRST_BOOST88.8%

Achievements and their recorded unlock rates.
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ACH_FIRST_BOOSTACH_KILL_1_SLIMEACH_KILL_KING_CUACH_KILL_1000_SLIMESACH_KILL_100_SLIMESACH_UNLOCK_SNACH_KILL_1_FIERCEACH_UNLOCK_BZACH_FIRST_RESETACH_KILL_KING_BZACH_KILL_KING_SNACH_UNLOCK_AUACH_UNLOCK_ARACH_KILL_KING_ARACH_ALL_QUESTSACH_5K_PTACH_20K_AUACH_40K_ARACH_100K_CUACH_KILL_KING_PTACH_KILL_KING_AUACH_UNLOCK_PTACH_60K_BZACH_80K_SNACH_KING_PT_NO_RESETACH_BOT_LVL5ACH_KILL_25_KING