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5_fingers absurd_res ambiguous_gender blood blood_on_clothing bodily_fluids bodysuit brown_hair butt clothed clothing digital_media_(artwork)duo ellipsis fingers fist gordon_freeman gore hair half-life headcrab headcrab_zombie hev_suit hi_res human humanoid inside lung mammal not_furry organs rear_view rib_cage shirt skinsuit sparkaed standing tan_body tan_skin tight_clothing topwear valve valve_corporation