Rule 34 Dev - 1girls 3d artist_request belt big_breasts breasts casual combine combine_assassin female female_only firearm flaunting gas_mask gun half-life half-life_(series) half-life_2 half_naked handgun handwear headwear human human_female human_only legwear mask masked masked_female nipples pale_skin pose posing solo stockings tactical_nudity weapon|13151477216