I didn't know 4v4v4v4 was possible,
we mostly did 8v8 CTFs.
I gave up on PS2 games because the first few I tried would say 2 or 4 or more players and too many times they meant "1 per PS2" without disclosing that ahead of time where xbox and GC reliably had splitscreen on pretty much any multiplayer game.
I’m honestly not sure 4v4v4v4 was a thing but I have a memory of doing four way team death match. I could be making things up. That was a long time ago.
I gave up on PS2 games because the first few I tried would say 2 or 4 or more players and too many times they meant "1 per PS2" without disclosing that ahead of time where xbox and GC reliably had splitscreen on pretty much any multiplayer game.