▁entering ▁the ▁prison , ▁Bat man ▁enc oun ters ▁Cat w oman , ▁who ▁inform s ▁him ▁of ▁host ages ▁held ▁inside ▁the ▁maximum ▁security ▁area ▁of ▁the ▁prison , ▁known ▁as ▁the ▁Ark ham ▁Wing . ▁As ▁Bat man , ▁the ▁player ▁can ▁choose ▁to ▁purs ue ▁the ▁three ▁b oss es ▁in ▁any ▁particular ▁order . ▁ ▁Before ▁leaving , ▁Cat w oman ▁also ▁inform s ▁Bat man ▁that ▁J oker ▁has ▁cut ▁the ▁air ▁supply ▁to ▁the ▁wing , ▁leaving ▁the ▁host ages ▁with ▁minimal ▁air . ▁On ▁his ▁way ▁to ▁finding ▁J oker , ▁Bat man ▁enc oun ters ▁W arden ▁Joseph ▁rig ged ▁to ▁bomb s ▁in ▁his ▁office . ▁In ▁an ▁attempt ▁to ▁free ▁him , ▁he ▁is ▁attacked ▁by ▁Dead shot , ▁who ▁plans ▁to ▁kill ▁Bat man , ▁after ▁agree ing ▁to ▁do ▁so ▁for ▁J oker , ▁P engu in ▁and ▁Black ▁M ask . ▁Bat man ▁is ▁able ▁to ▁defeat ▁him ▁and ▁rescue ▁W arden ▁Joseph , ▁who ▁tells ▁Bat man ▁that ▁J oker ▁is ▁located ▁in ▁his ▁office . ▁M aking ▁his ▁way ▁to ▁the ▁office , ▁Bat man ▁confront s ▁the ▁J oker ▁and ▁is ▁able ▁to ▁defeat ▁him , ▁acqu iring ▁codes ▁needed ▁to ▁shut ▁down ▁the ▁gas ▁set ▁to ▁release ▁on ▁the ▁host ages . ▁He ▁not ices , ▁however , ▁that ▁the ▁air ▁supply ▁was ▁not ▁cut ▁as ▁Cat w oman ▁had ▁stated . ▁ ▁On ▁his ▁way ▁to ▁stop ▁P engu in , ▁Cat w oman ▁again