PS1/2 [Ps2] Co-Op Multiplayer Adventure/RPG - Any good ones?

[KirbyPink]

I´m looking for some Ps2 or GameCube games, that you can play Co-Op on. RPG preferly trough the whole story or something similar.
Final Fantasy Crystal Chronociles is a good example of what i mean.

 

[DeltaBladeX]

I will recommend Snowblind engine games like Baldur's Gate: Dark Alliance 1 / 2, Champions of Norrath / Champions: Return to Arms and maybe Fallout: Brotherhood of Steel.