Limitations: PS2

Misunderstandings

Average commenter on videos of mine:

"BuT tHe PS2 HaS lImItAtIoNs!” Yes. That is true.
The PS2 is a pretty weak system, however, may I suggest checking out other games like Kingdom Hearts II?
Or, another title from Rockstar Games themselves, which I'm sure you've at least heard of, Grand Theft Auto: San Andreas?

Actual limitations

Due to having little RAM to use, things that are very common on mods made for PC cannot be done on the PS2:

Loading every Animation Group of the game to avoid A-Posing. (Forget about mods like Super Mod running properly on the PS2)

Keeping multiple Threads running at the same time.

Rockstar Vancouver did things like copy-pasting the same Animation in MANY different Animation Groups, leading to a very specific set of Animations to use for specific missions, and avoid loading unnecessary ones.
Check out the Common Misconceptions page for more information.