PS2 Online Gaming

Here you can see the list of PS2 games that are incompatible with newer slimline models.
https://en.m.wikipedia.org/wiki/List_of ... yStation_2
I want to play Ever Quest Online Adventures:Frontiers,do you know something about running it on slim models.Does the game don't working at all ,sound or graphics issues,freezing?

I didn't even knew that newer revisions of the PS2 have issues with the actual games itself. Seems quite stupid.

Final Fantasy XI (Requires the PlayStation 2 Hard Disk Drive)

So ... does that qualify as incompatible?
Edit: Now I get it. Does FFXI accepts usb drives?

TimeSplitters 2 (some copies)

Now I want to know what doesn't really work with TimeSplitters 2.