Cheats for Mafia: The City of Lost Heaven (PC)

Easy money:
Bet a negative number at the casino to gain money every 
time you lose. Kill the men in the all black suits with 
the black hat (gangsters) to earn $500 each.
Go into the country and speed in a fast car.

Press [SHIFT] + [~] for console. Write down these codes:
DEADGUNS     - Weapons and ammo
Mademan      - full life
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