Age of Empires 2
marco- all map explored
polo- fog of war eliminated
cheese steak jimmy's- 1000 food
lumberjack- 1000 wood
robin hood- 1000 gold
rock on- 1000 stone
torpedo- type # of desired player, no spaces after torpedo, to kill that player
black death- you win instantly as everyone dies
wimpy wimpy wimpy- you die utterly and completely and lose
Now for the fun ones:
natural wonders- become nature, hawks explore but aren't units, if all land animals die you lose, even deer can attack by nibbling
to smithereens- summon petard, a suicide bomber
how do you turn this on- summon car with machine guns
i love the monkey head- summon a naked man that runs faster than anything, even the car, crosses biggest maps in seconds, does nothing else whatsoever
I'm a dirty, dirty cheater. I'm sure I missed one, though. Know what's fun? Open chat, enter the car code but don't enter, instead ctrl+c to copy first, then just enter, ctrl+v, enter, as fast as you can, army of cars in a minute, raze entire maps without moving your starting villagers. Never gets old.
Edit: remembered some more
aegis- everything builds and researches instantly, for you and your enemy
i r winner- win without killing anyone
resign- lose immediately without dying
I think I'm still missing some, but those were all the ones I used, for the most part.