You do the cheats during gameplay. You hace to pull your cell phone out and pull up the keypad and enter a number
I know 2 for weapons they are 4865550100 and the other one is 4865550150.
In GTA vice city there is and also in GTA 3 just enter the different costume cheat until you are a cop swat or FBI agent or army man the cheat for GTA 3 is:right,down,left,up,L1,L2,up,left,down,right...
it is ifirstdoz
Unknown. Rockstar games has yet to release any information on the New Game. and to be exact it's Grand theft Auto V.