Theme Hospital

Type these on the Fax machine screen then press the big green button:
7287 -Go to rat shoot level after winning level
24328 - Enable the following in-game cheat codes:
Ctrl+C - All research completed
Shift+C - Get $10,000

Shift+Q - Earthquake
Shift+E - Emergency
Ctrl+Y - End year
Ctrl+M - End month
Ctrl+Shift+C - Gives you everything