Rule 34 Dev - 2boys 3d 3d_(artwork) 4:3 alien anal_sex armor ass big_ass bulletproof_vest butt combine combine_charger combine_soldier fully_clothed gay half-life half-life:_alyx half-life_2 hi_res high_resolution highres hopwire human humanoid male male/male penetration sex submissive_male tagme transhuman valve vortigaunt|7096659456