who was the murderer in and then there were none
Agatha Christie: And Then There Were None Following the game's completion, the player is given one last challenge that will reward them with the original ending to the book. The original ending to the book, where Wargrave is the killer. Dying, he wants to mete out justice personally to criminals who have escaped punishment, who he has invited to the island. The alternate ending details the events of the book, And Then There Were None, wherein all the guests on the island are killed by Wargrave except for the last two, Vera and Lombard. Vera then shoots Lombard, thinking him the murderer (since Wargrave has faked his own death), and then hangs herself. Wargrave then shoots himself.
And Then There Were None In the confession, Justice Wargrave writes that he has long wished to set an unsolvable puzzle of murder, but is morally limited to victims who are themselves guilty and deserving of such an end. He explains how he tricked the gullible Dr. Armstrong into helping him fake his own death under the pretext that it would supposedly give him the freedom to help the group identify the killer, and also explains that after Vera died, he replaced the chair in her room neatly against the wall. Finally, he reveals how he used the gun and some elastic to ensure his own death matched the account in the guests' diaries. Although he wished to create an unsolvable mystery, he acknowledges in the missive a "pitiful human need" for recognition, hence the confession.