Press CTRL+ALT+C to bring up the cheat console, use the following cheats:
Code - Result:
Black Death - Kill All Units
Shake Shake - Earthquake
Glub Glub - Flood
Gimme Goods - Add Resources
Kill Enemy Units - Kill Enemy Units
Kill Load Units - Kill Load Units
Delian Treasury - Add 5,000 Delians
I win again - Win Scenario

Unknown Codes:

Uncle Sam
TimeBandits
Lizardman
Jumble town
Bad Wallpaper
Great Heat
SoundFrags
Reset Timing
Dump Timing
Toggle Alpha
SpawnMugger
SpawnBandit
Chinese Flu
IgnoreDesire
FunForElite
WaresForElite
TeaForElite
SilkForElite
CeramicsForElite
HempForElite
Shutime
Framerate