Duke Nukem Forever: American Psycho Reference Easter Egg
When you reach the “Titty City” chapter, you will notice ATM machines – two of them. One is close to the slot machines at the game room. The other is close to the bar. Go to one of these ATM machines and try to use it. It will say “Card read Error.” Try the action again and the message will change to “Feed me a Stray Cat”. This works on both ATM machines but won’t be repeated.
This sequence refers to an American Psycho scene where Patrick Bateman attempted to get money from an ATM machine and it tells him “Feed me a stray cat”. He tried to actually do that before a woman starts yelling and effectively runs him off.