Agatha Christie: And Then There Were None retains most of the basic plot elements of Agatha Christie's novel of the same name; the major differences are the inclusion of the playable character, Patrick Narracott, and the creation of a range of possible endings. To further the connection between the game and its source material, Christie's novel was included in the North American PC release of the game. "Agatha Christie: And Then There Were None" was followed by two more games, "" and "". Since they were based on their respective novels, their plots were unrelated to this first game. Reactions to the game were mixed, with many
Agatha Christie: And Then There Were None sections of gameplay are optional, and the player may ignore many of the side-quests. This divided progression adds another dimension to gameplay, as not only does the player have to be in the right place to find a clue or solve a puzzle, but must be there at the right time. For example, an empty room in one act could hold a vital clue in the next. "And Then There Were None" features a journal system to aid in the collection and piecing together of clues. The in-game journal records everything that the player needs to advance in the game,