Three: Twenty One, also called 3:21, is an independent single-player adventure game developed by small team of gaming industry veterans and volunteers.
3:21 is divided into smaller adventure games or programs that act as a way to open a dialog with the player and encourage interaction and exploration. Unlike other games, 3:21 doesn't aim to progressively become more challenging, (neither through mechanics or difficulty) instead it evolves through player progression and the challenges give way to a maturing story-telling system. Through the player's interactions with these basic functioning adventure programs that serve as a timeline of events, they discover what 3:21 is really about and just how real games can get.