^-> Just the mention of the card game gets me nostalgic. It was glorious! The best mini-game in any game ever! Why the heck didn't they have it in the other 2 episodes? =(
Step 1: Mod your PS2.
Step 2: Import. =D
As for battle system, I really can't decide between Ep 1 and 3. I'd have said 3, if it wasn't because of that awesome "turn-wheel" thing in episode 1 that could increase exp, boost, crit-rate etc on certain turns. That was another absolutely brilliant feature.