 If, while in the office of "Vercettis Mansion", you stand in front  of the bank of security monitors and look at them through the sniper  rifle scope, you will see that the image displayed on some of the  monitors is that of the main room in Tony Montanas (Scarface)  mansion (featuring the sweeping staircase, the "The World Is Yours"  statue, and the small pool that Tony ends up landing in after being  blasted in the back on the balcony above).