Complex sentence: Tifa also appears briefly in the game', set one year after the events of "Advent Children" in which she helps the protagonist Vincent Valentine defend the Planet against Omega WEAPON; she later appears in the game's epilogue, discussing Vincent's apparent disappearance.
Split into simpler sentences: Tifa also appears briefly in the game', set one year after the events of "Advent Children" in which she helps the protagonist Vincent Valentine defend the Planet against Omega WEAPON. She later appears in the game's epilogue, discussing Vincent's apparent disappearance.