First boss
FIRST_BOSS86.6%

Achievements and their recorded unlock rates.
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FIRST_BOSSFIRST_BLOODBOSS_VIRUSBOSS_FUNGUSBOSS_BACTERIABOSS_SPLITTERALL_WEAPONSRIFT_10LEVEL_20PATH_LIGHTNINGEXTRACT_10DUAL_BOSSRIFT_30COMPENDIUM_FULLALL_PATHSPATH_SHADOWPATH_FROSTPATH_FIRE