Note: Below are a list of cheats and codes from the PS1 and PC version of Theme Hospital. Though I have verified all of the PC cheats, and removed the ones which I could not get to work (I.e.: F12 to win the game, Ctrl+1 for a new patient) that are found on other sites, I am unable to verify the PS1 cheats so... let me know if they're wrong. Lastly, if you're interested you can also find my full review of the game here. So without further ado, cheats!
PC cheats:
In the lower left corner, during gameplay, you will sometimes get a notice with a green question mark icon. When clicking on this you will open up a fax machine page with some info on it, you can use this fax machine to enable cheats. Whilst on the fax machine page enter in “24328” before pressing the large blue button on the top right, this will enable cheat mode. Return to the game and then use any of the following key combinations to enable that cheat. All of these cheats have been verified.
Select any level: After completing a level, whilst on the board game press C and click which hospital you want to play.
Rat shoot level: Type in 7827 on the fax machine, after winning the level you’ll go to this secret level.
Skip to the end of the month: Ctrl-M
Skip to the end of the year: Ctrl-Y
Have all items: Shift+Ctrl+C
$2000 (hold for more money): Shift-C
All research completed: Ctrl-C
PS1 Cheats:
Clean hospital: Save the game when the hospital is full and reload, all rubbish and patients will disappear essentially allowing you a fresh start.
No rats: Put plant pots in front of rat holes to stop them from entering/exiting that hole.
Level passwords:
Level 1: , , , ,,, , .
Level 2: , ,, , , , , .
Level 3: , ,,, , , , .
Level 4: , ,,, , , ,.
Level 5: , ,,, , , ,.
Level 6: , ,,, , , ,.
Level 7: , ,,, , , ,.
Level 8: , ,,, ,,..
Level 9: , ,., ,,,.
Level 10:,,,., ,,,.
Level 11:,,,,,,,.
Level 12:,,,,,,..