Normal bomb
NORMAL_BOMB74.5%

Achievements and their recorded unlock rates.
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NORMAL_BOMBBOOTS_PICKUPHEALTH_PICKUPHELMET_PICKUPLEGGINGS_PICKUPTEN_PERCENTANTI_BOMBCHESTPLATE_PICKUPBOSS1_DEFEATEDZERO_BOMBTWENTY_PERCENTBOSS4_DEFEATEDBOSS3_DEFEATEDBOSS2_DEFEATEDGOLDHELMET_PICKUPFIFTY_PERCENTBOSS5_DEFEATEDMULTI_BOMBONEHUNDRED_PERCENTFIVESTAR_RATING