Age of Empires 2: Definitive Edition cheats
Map cheats
marco: Reveals the entire map. It works as a switch - on or off - so entering it again will hide the map.
polo: Removes the fog of war. This too works as a switch, like so entering it again will restore the fog of war.
Cheat units
alpaca simulator: Creates an "Alfred the Alpaca", which looks like a Llama. Very high armour value, trample damage, and attacks with headbutts. Strong in melee combat, weak against speed, ranged attack.
furious the monkey boy: Creates a "Furious the Monkey Boy". Destroys buildings easily, but slow and dies after taking nine hits.
how do you turn this on: Creates an "AC Cobra". Fires rounds of bullets, impressive long range, and high hit points, armour, and damage. Poor AI, bullets harm friendly units.
i don't exist: Creates a "Penguin". High armour and damage.
i love the monkey head: Creates a "VMDL". Quick and good for exploring. Cannot attack but grant attack bonus to buildings if garrisoned. Fun fact: VMDL stands for Villager Male David Lewis and in case you're wondering, David Lewis was in the team that made the game.
to smithereens: Creates a "Saboteur". Deals damage by committing suicide. More effective and faster than a "Petard", the only non-cheat suicide unit on land.
Resources
cheese steak jimmy's: Increases Food by 10,000.
lumberjack: Increases Wood by 10,000.
robin hood: Increases Gold by 10,000.
rock on: Increases Stone by 10,000.
ninjaconnor / ninjalui / rowshep: Increases all resources by 1,00,000.
And even more cheats
!mute: Silences taunts. That's it.
!nomute: Reverses !mute.
aegis: Building, researching, resource gathering, and training is done instantly - for everyone including the AI. Works like a switch, so can be turned off.
black death: Kills all other civilisations, except yours. Yes, even your allies.
i r winner: Declares your civilisation as the winner.
natural wonders: Transfers player control to nature, in lieu of losing control of your civilisation. It is irreversible - there's no way to regain control of your civilisation other than starting a new game.
resign: You lose the game.
torpedo X: Kills the specified civilisation, where "X" is civilisation number from 1 - 8.
wimpywimpywimpy: Kills all of your units, resulting in the same outcome as resign.
woof woof: Transforms birds into "Stormy Dogs". They are flying dogs with red capes. No gameplay change.