Cheatcodes:

Press [~] during the gameplay and enter one of the following codes.

10% cheaper units in campaign mode:
bestbuy
10% cheaper units in campaign mode:
gamestop
Get $20,000:
add_money 20000
Complete all construction in city:
process_cq (city name)
Complete all military units in city:
process_rc (city name)
Capture indicated city:
capture_settlement (city name)
Defender automatically wins:
auto_win defender
Win next battle:
auto_win
Attacker automatically wins:
auto_win attacker
40% bigger elephants in campaign mode:
oliphaunt
Toggle fog of war:
toggle_fow
Lists traits:
list_traits
Enemy’s walls collapse:
Jericho
Invincible general:
invulnerable_general (general name)
Kill given general:
kill_character (generalname)
Change season to winter:
season winter
Change season to summer:
season summer
Change to year:
date (year)
Force your opponent to accept a diplomatic proposal:
force_diplomacy accept
Increase population in city by amount:
add_population (cityname amount)
Move general to coordinates in (x,y):
move_character (generalname x,y)