After playing AoE1:DE and 3:DE quite a bit recently, I can now confidently say this. (No opinion on 4, as I haven’t played it yet.)
The AoE2:DE AI is like the worst of 90s AI design in overdrive to make it “challenging”. There is zero effort put into making it appear remotely human, it’s utterly dumb and hilariously easy to outsmart as long as you can keep up, but the higher the difficulty, the more of an infuriating spambot it is - and nothing more. Fighting against Hardest AoE2:DE AI is not fighting against a “computer player”, it’s fighting against a horde of units and buildings each microing itself independently and trying to kill you at all costs like fucking Terminator, and it has absolutely nothing to do with strategy or Age of Empires.
For comparison:
AoE1:DE:
Pros:
- Will actively try to attack from different directions and avoid your defences
- Builds actual defenses (i.e. a ton of towers since this is AoE1)
- Goes bananas when you build a wonder
- Can competently play on hybrid/water maps and builds a relatively resonable amount of ships
+/- Sometimes also unrealistically good at dodging projectiles, but it’s bearable
Cons:
- Kinda dumb overall
- Attacks with loose streams of units (but again, this is AoE1)
- Something weird with difficulty levels
AoE3:DE:
Pros:
- Attacks from various and unexpected directions
- Builds competent defenses
- Attacks with actual armies which even look epic
- Plays equally well on almost all maps (except a few full-on water maps)
- By far the closest to appearing human, rarely feels like a cheating robot even on Hardest
- AGGRESSIVELY counters your units, especially late game
- Some of the toughest late game 1v1 matchups I have ever played
- Consistent difficulty and strength
- Does not cheat with micro and dodge cannon shots or whatever
Cons:
- Breaks on like 1-2 maps
- Sometimes too passive in team matches
- Sometimes still a bit too bumrush aggressive (but the least so of all 3)
AoE2 “CD” AI:
Pros:
- Builds walls and defences
- Attacks with armies
- Adapts reasonably well to mixed/water maps
Cons:
- Yeah you can tell it’s almost 25 years old
AoE2:DE AI:
Pros:
- It’s “challenging”, I guess
- Can pull off some meta multiplayer rushing crap
- Pretty reactive in team matches
Cons:
- Usually attacks in a straight line, even if it means banging its head on a bunch of castles
- Doesn’t use formations, in AD 2023, and attacks with a loose diarrhea of random units as if it was still 1997, which is both an eyesore and infuriating
- Blatantly robotic, with micro and macro which is such blatant cheating it’s not even funny and I will take resource cheating over this parody any day
- I’m surprised it’s not programmed to make each and every unit dodge arrows too, or maybe it can dodge melee hits as well? Challenge for the devs?
- Zero scaling with population cap, manages 150 villagers just as robotically as 50 - population cap is a second difficulty setting
- Ignores the wonder if you build one, cannot play half the modes available
- Goes utterly bonkers when it sees a patch of water on a 95% land map and will build 10 docks on every pond it finds (i.e. mixed maps are automatically far easier with how much resources it sinks into ships that can barely move)
- Barely, if at all, adapts to your army composition
- Builds almost no defences besides castles (sometimes pointed at the edge of the map or at an ally)
- Random difficulty spikes - team matches can be unwinnable or autowin because one AI has 3 hussars 30 minutes into the game while the enemy has a post-Imperial army, on the same difficulty, for no clear reason
- Its dumb, caveman design means that as soon as you can consistently defend against it, the game becomes a watching-paint-dry-simulator and you cannot lose, just have to chase down its 15 town centers. Making it either too easy and incredibly boring to play against late game, or an infuriating, overpowered spambot which feels like “what if they wanted to make a hardcore AI in 1999 without CPU limitations”.
It’s honestly embarrassing and pathetic. I’ve tried giving it dozens of chances, the latest one today after a few weeks of break and enjoying myself far more in AoE3 (which I used to always like less), but this is just a joke. It feels like AoE2:DE is made on the lowest budget of all. How does AoE3, supposedly always the underdog with a lot more complexity, have FAR better and more enjoyable AI that actually feels like made in the last decade? How does the infamous AoE1:DE AI do a bunch of basic things far better?
There is no excuse at this point. I’m done until they actually start caring about the single player playerbase.
edit: all the + and - symbols got converted into identical bulleted points, yay