Point of No Return

The Point of No Return is a term used to describe the point, in-game, that happens right before the final boss. From this point, it is impossible to turn back, and, as such, the only way to go is toward the boss. Usually, a save point can be found right before it.

Also, a message might appear, questioning if the party should continue. In some games there is no message before the Point of No Return because once the Final Boss is defeated, the player is able to save their game and return to the main menu where they can reload the game from the last save point.

Kingdom Hearts
In Kingdom Hearts, the point of no return is right before the fight with Ansem, Seeker of Darkness, in the Final Rest.

Kingdom Hearts: Chain of Memories
Sora's Story In Sora's story, the point of no return is right before the fight with Marluxia's second form in Castle Oblivion. After the player steps behind Donald and Goofy and starts heading towards the door, a cutscene begins. During the cutscene, Donald mentions that this is the final battle, and Goofy asks if Sora is ready. A message Reverse and Rebirth In Reverse and Rebirth, the point of no return is right before the fight with Marluxia's second form in Castle Oblivion.

Kingdom Hearts Birth by Sleep
Ven's Story In Ven's story, blah blah blah Terra's Story In Terra's story, blah blah blah Aqua's Story In Aqua's story, blah blah blah

Kingdom Hearts 3D: Dream Drop Distance
Sora's Story In Sora's story, blah blah blah Riku's Story In Riku's story, blah blah blah