Anna is a 2012 puzzle video game for Microsoft Windows, OS X and Linux.

Narratively a psychological horror set in an abandoned sawmill nestled high in the Italian mountains, Anna challenges the player to uncover horrific clues and use them to solve puzzles related to the player character's dark past. The player's behavior does determine the mental health of the main character and change locations and unveil new secrets leading to different endings.
On 13 April 2013, the Extended Edition was released which added new environments, puzzles, user interface, music, improved graphics, and a new character.