orer ▁of ▁Mars , ▁inf am ous ▁for ▁killing ▁mut ant ▁colon ists ▁to ▁obtain ▁the ▁" O racle ▁Stone ". ▁With ▁this ▁stone , ▁Alexander ▁for es aw ▁the ▁future , ▁read ▁ant agon ists ' ▁minds ▁and ▁built ▁his ▁corpor ate ▁emp ire . ▁Alex is ' s ▁good ▁will ▁was ▁used ▁to ▁l ure ▁her ▁into ▁ste aling ▁the ▁Stone ▁and ▁bring ▁it ▁to ▁Mars , ▁only ▁to ▁fall ▁into ▁the ▁hands ▁of ▁Thomas ▁D anger field , ▁the ▁original ▁discover er ▁of ▁the ▁Stone . ▁ ▁The ▁character ▁of ▁Larry ▁Hamm ond , ▁who ▁appeared ▁in ▁Mean ▁Stre ets , ▁returns ▁to ▁this ▁game , ▁giving ▁information ▁to ▁the ▁player . ▁Low ell ▁Per c ival ▁who ▁is ▁introduced ▁here , ▁also ▁appears ▁in ▁K illing ▁Moon , ▁as ▁does ▁Mac ▁Mal den , ▁who ▁appears ▁in ▁both ▁K illing ▁Moon ▁and ▁P and ora ▁Direct ive . ▁ ▁Game play ▁Un like ▁the ▁more ▁experimental ▁Mean ▁Stre ets , ▁Mart ian ▁Mem or and um ▁ad her es ▁to ▁the ▁genre ▁convent ions ▁of ▁the ▁point - and - click ▁advent ure ▁game . ▁The ▁game play ▁style ▁is ▁based ▁on ▁inter rog ations , ▁gather ing ▁information ▁which ▁" un lock s " ▁new ▁destin ations ▁and ▁inter rog ation ▁options . ▁A ▁verb ▁bar ▁at ▁the ▁bottom ▁of ▁the ▁screen ▁allows ▁players ▁to ▁select ▁different ▁ways ▁to ▁interact ▁with ▁their ▁environment . ▁C ertain ▁objects ▁can ▁be ▁collected , ▁placed ▁in ▁an ▁invent ory ▁and ▁then