Is it the same as Chrono Trigger?
It is the sequel on PSX. It has a completely different plot but the same idea of time travel. Go download it. I just got the game for Christmas and it lives up to the hype. It's a classic.
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Thats a no on both counts. Just play it and enjoy it. Theres no need to have played Chrono Trigger, and it wont ruin that game for you if you havnt.