Cheat mode: DOS version
Type one of the following codes and press [Enter] at the single player selection or network player selection screens. A sound will confirm correct code entry. Press C after game play begins. A (Plus) character will appear besides the date to confirm that the selected cheat is active. Note: To cheat with a saved game, display the map and player screen. Then, enter the desired cheats, select the saved game from the "Load Saved Game" screen. Begin game play and press C to enable the selected codes.

Result - Code:

Build any fence at any time - fences673
Borrow any amount of money from bank - loans039
Buy any estate without limits - estates131
Select any house at any time - houses738
Press [Ctrl] when placing house for instant building - build909
Use any undesirable action on easy level - actions674
Build any gadget - gadgets337
Press [Alt] + I to toggle missions - missions824
Faster network game - speed471
Buy worker at any time - worker902
Convert worker into gangster at any time g- angster822
Buy any gangster weapon - weapons473
Select any tenant at any time - tenants127
Press [Alt] + C to toggle complaints - complain840
Press [Alt] + P for police cadets, [Alt] + M for mob bribes - cadets552
Switch teams in single player mode - teams418
Play any map with any number of players - maps751