Multiple endings

Some games in the Final Fantasy series have multiple or secret endings, the game's ending depending on the player's actions taken during the game.

Final Fantasy V
The ending sequence depends on who is left alive at the end of the final battle. If everyone is left alive the Warriors of Light return to their lives in their new world, and one of the survivors sends a letter to Mid Previa about what has been going on since the final battle. If everybody survives, the sender of the letter will be Krile. The Warriors of Light meet up at the Great Forest of Moore and decide to embark on another adventure to keep on protecting the crystals of the world.

If, however, one or more characters are Knocked Out at the end of the final battle, they won't be able to leave The Void and are left behind. The ending progresses as normal but the other characters are mourning for their lost comrade(s) and wonder if they were really swallowed into the Void. When the remaining Light Warriors gather at the Great Tree the Warriors of Dawn appear and bring back any lost party members, saying it's not their time yet to join them, and the four are once again reunited.

Final Fantasy VI
The ending sequence depends on who the player has recruited back into the party by the time they fight the final boss. Celes, Edgar and Setzer are the only mandatory members for the final battle, and Terra will appear after the battle to take part in the ending, regardless of whether she was recruited into the party or not. The more party members the player has, the more ending sequences they get and the content of the ending sequences varies slightly depending who is included.

Dirge of Cerberus -Final Fantasy VII-
The player can unlock the secret ending that shows Genesis Rhapsodos (played by Gackt) waking up in an underground cave, if they collect all G Reports during the game.

Final Fantasy IX
The player can unlock an extra scene in the ending by having the Hammer in the inventory during the ending sequences. The Hammer can be obtained as the final prize from Queen Stella at the Stellazzio coins sidequest. The extra scene shows a longer scene of the "I Want to Be Your Canary" play.

Final Fantasy X-2
Final Fantasy X-2 has a few different endings. If the player loses the final battle Vegnagun will fire its cannon and destroy all of Spira. Defeating the final boss ends the game with Yuna, Rikku and Paine flying away on the Celsius while Nooj, Gippal and Baralai hold a speech at the Luca theater about Spira's future.

If, after getting the "Chapter 5 Complete" message, the player presses button ( in the Japanese version) Tidus will whistle at Yuna while she is crossing the Farplane Glen. If the player missed either talking to Maechen in Chateau Leblanc in chapter 3 or did not trigger Tidus's whistle at the Farplane when Yuna fell in at the end of Chapter 3, the player gets a scene where Tidus's spirit embraces Yuna, and Yuna says that she loves him, and that he will always he part of her. Tidus's spirit then disperses into pyreflies and disappears.

If the player talked to Maechen in Chateau Leblanc, got Tidus to whistle at Yuna four times on the Farplane during the time Yuna fell in at the end of Chapter 3, pressing after the "Chapter 5 Complete" message triggers Tidus's whistle, and a fayth appears on the glen asking Yuna if she wants to see Tidus again.

If answered positively, Tidus will return at the end of the game and reunite with Yuna. If the player answers negatively to the Fayth's question, Yuna says Tidus is already with her, and walks away from the glen. The ending plays as normal and Tidus does not return, but the player gets an extra scene after the credits where two monkeys sit in sunset in Zanarkand.

If the player achieves 100% completion, and tells the fayth they want Tidus to come back, they get an extra secret ending where Tidus and Yuna travel to Zanarkand together.

Final Fantasy XII: Revenant Wings
If the player completes all missions and defeats the final boss at level 99, they get a secret ending after the credits where Vaan and Penelo run away from Rabanastre together, suggesting a romantic connection between the two.

Final Fantasy XIII-2
It has been confirmed that Final Fantasy XIII-2 will feature multiple endings.

Final Fantasy XIII-2's normal ending happens after five hours of gameplay and features Serah dying from a seizure of sorts from seeing the future. Noel and Hope along with a rebirthed Cocoon are sucked into Valhalla by Chaos. A ghostly or stone Lightning sits on Etro's throne with a screen reading "To Be Continued".

Obtaining all fragments unlocks a scene after this ending saying Caius will create a world without a goddess.

There are also a series of Paradox endings: One where Noel and Serah become monsters and another where they died fighting a group of Atlases running rampant. Also, another ending shows Snow and Serah rides off in the Shiva Sisters motorcycle together, while Noel and Hope looks on.

Final Fantasy Type-0
Hajime Tabata, the director of Final Fantasy Type-0, has stated in an interview that there is a secret ending in the game but he hasn't revealed how it will be unlocked. The ending depends on if Class Zero's twelve members choose to become l'Cie or not.

The default ending shows final moments of members of the Class Zero who slowly die in their classroom at the Peristylium. Cinque loudly cries as she is afraid of death, however, Queen and the others console the girl. Their final moments include friendly conversations. Some time later, Machina Kunagiri and Rem Tokimiya arrive at the Peristylium just to find their friends dead, lying underneath the tattered banner of the nation they had defended at the cost of their own lives.

Machina and Rem not sharing their allies' fate is explained in secret cutscenes if Class Zero chooses not to become l'Cie, which depict how Machina became a Byakko l'Cie from Qun'mi and his fight with Rem, who became a Suzaku l'Cie. When Rem dies after being impaled on Machina's rapier, Machina takes her into his embrace and loudly cries before he crystallizes himself around her, creating a bloody red crystal. Though physically trapped, the two aid their friends in spirit during the final battle.

Some time later, Arecia Al-Rashia approaches their crystal and frees them from their stasis. Machina and Rem then float holding their hands and fly through Arecia. In the game's epilogue, with Oriense's crystals rendered powerless, the two proceed to reunite the people under one banner and begin a new age of self reliance.

In an alternate ending, titled as a what-if scenario, Arecia removes the crystals from Oriense's history and thus creates a new timeline where the Pax Codex is never broken and everyone who died in the war that occurred in the original timeline, Class Zero included, get a second chance in life.

Dissidia Final Fantasy
If the player obtains all the Chaos and Cosmos Reports, in the first Dissidia game, a secret ending is unlocked where Cosmos is revealed to be alive and well, and discuss the future of World B with Cid of the Lufaine.

Dissidia 012 Final Fantasy
Futher explanation is given about the forementioned scene in this sequel, as Cosmos resigned to remain in the new dying world of the events of Dissidia as she wishes Cid the best of luck.