Disc 3
Please note that the following walkthrough sections are full of spoilers. Do not read ahead if this is your first time playing through the game.
The PlayStation 4, PC and mobile versions of the game do not have discs. Instead the different sections are referred to as “Part 1”, “Part 2” and “Part 3” in the game.
39) Northern Cave

The split paths in the the Northern Crater Cave that lead to the final battle against Sephiroth.
40) Final Preparations and Side Quests

A full list of the end game side quests that you can complete before moving on and finishing the end of the game.
41) Sephiroth

The final battles against Jenova, Bizarro Sephiroth, Safer Sephiroth (the One-Winged Angel) and the end of the game.