GeneralSturnn: Age of Empires II AI doesn't cheat? okay so AI always team up with each other against player(s)? never once really thinking about being diplomatic with player? yeah gonna have to say no... the only game I've found where the AI are semi competent or competent in general is the Civilization series, Rise of Nations, Dawn of War, Empire Earth II.
the AI in Empire Earth spam Priests and prophets, they also again have an option in the editor called "cheat"
Also, for Command&Conquer Red Alert, the AI only briefly wages war against one another in an FFA setting(RA not RA2, in RA2 you could set the game to FFA) then they would ally with each other and go directly to your base.
Congratulations for missing my whole point.
There are AI cheats in many games, but the point is that Empire Earth has them in such an atrocious amount that it does not even resemble an equal opponent. It's fake difficulty. You cannot wage economic warfare. You cannot achieve a meaningful technological upper hand. You cannot try to destroy the enemy in waves. If you leave the AI alone for 5 minutes after destroying all his farms and villagers, when you come back it's just as strong as it was before. There is no strategy in Empire Earth, just a race to spam a large army and overrunning the enemy in one go. Even if other strategy games rely on some AI cheats to make do, a necessary evil still present in most games, they still keep it benign enough that you can employ various strategies and playstyles to achieve your goal, and at least you feel like you are fighting an enemy that plays on roughly the same rules as you.
Toggling AI cheats in an editor does not excuse their existence in the first place, and your inability to affect them in a legitimate in-game menu.
Also, AoE2 AI is diplomatic with the player, it regularly offers alliances in exchange for supplies. "I have set you as neutral. Give me 200 of all resources and I will set you as Ally" is something you are likely to see at least once in every typical Random Map game.
FFA AI gang-up is not an AI cheat, it's just bad AI design. It's a stupid feature that exists in too many RTS games, including AoE2, though you can usually avoid that by putting all players in locked one-man teams.