AO is less about one more year of age, and more about "hey, this game will burn out your eyeballs!"
9 times out of 10, AO just means there are people with no pants or many people without shirts,
ef you know what I mean.
There is exactly one (1) game rated EC for Cube (and also PS2). It is Dora The Explorer: Journey To The Purple Planet. Deezer told me it was good.
The only other EC games I could find on any modern system were all three (3) for GBA:
Care Bears- Care Quest
The Koala Brothers- Outback Adventures GBA
Franklin the Turtle
Here are all the AO games I found that were not solely porn:
Playboy the Mansion: Private Party (PC)
Lula 3D (PC)
Fahrenheit: Indigo Prophecy Director's Cut: PC CD ROM (PC)
Grand Theft Auto: San Andreas (PC, PS2, XBOX) -- This was the first version.
Leisure Suit Larry: Magna Cum Laude Uncut and Uncensored (PC)
Singles (PC)
Peak Entertainment Casinos (PC) -- The only descriptor is "Gambling". That must be a LOT of gambling!!
Thrill Kill (PSX) -- This never came out but I guess it got rated.
The Joy Of Sex (CD-i) -- Not sure what this is, but notice the system it's on.
Then there are 14 more AO-rated PC titles that are pretty much just porn-based but went through the ESRB for whatever reason.