FFIV:earth, underworld, moon
FFV: attempt to save crystals, visit galuf's planet
FF7: leave Midgar after the Shinra debacle, death of Aerith
Chrono Cross: Fort Dragonia, Sea of Eden, Serge, Lynx, back to Serge
Trigger: Defeat Magus, Crono death, Crono resurrection
It seems like there are several points in countless games (these are but a few from the list of hundreds of games) that have such big polar opposite turning points. I remember playing CT and thinking that defeating Magus would be the end of the game, or thinking Fort Dragonia might be the end of CC (not quite registering the fact that there was a CD2). seems as though this makes for quite interesting games, as IMO these are all fantastic. I can't really recall from FF6 since I've barely played it, but there's an element like this to it as well. perhaps kishotenketsu? Chrono Trigger had all those sidequests and the black omen at the end, chrono cross very quickly had the dead sea, terra tower, then dream devourer. some jo-ha-kyu mayhap?