Defeat boss 1
DEFEAT_BOSS_167.4%

Achievements and their recorded unlock rates.
Loading your Steam progress…
DEFEAT_BOSS_1DEFEAT_BOSS_2GET_DOWN_STRIKEDEFEAT_BOSS_3KILL_5_WITH_THUNDERDEFEAT_BOSS_4DEFEAT_BOSS_5COMPLETE_EXORCIST_GOODQUEST_DREAMGET_LAST_ARMORQUEST_SPIDER_PAIMONREFLECT_3_DEATHCOMPLETE_CLASSICDEFEAT_BOSS_6GET_LAST_WEAPONGET_NECRONOMICON_GOODENDING_GOOD_50ENDING_GOOD_100KONAMI_CODEENTER_CODE_WIZARDTORNADO_DEATHBECOME_EVILKILL_TANCREDENDING_BAD_100BUY_A_TOOLLISTEN_HANS_TWICEDESTROY_ALL_STATUECOWARD_ENDINGENDING_BAD_50EAT_WALL_CHICKENENDING_FUTUREBLOCK_LANCES_SHIELD_DROPPEDUPGRADE_ALL_TOOLSSLEEP_ENDINGCOMPLETE_COOP_GAMESKIP_IN_CASTLE_3MAYOR_LEG_DAYBUY_EVIL_TOOLTWO_PLAYERS_CONTRAENDING_REDEMPTHIDEOUT_EASTER_EGGPARADE_DUKE