Assassin's Creed II: Discovery is a video game for the Nintendo DS and iOS, part of the Assassin's Creed series of video games. Ubisoft's producer Ben Mattes officially revealed the development of the game in Apple Inc.'s keynote speech on September 9, 2009, for a November 17 release. The iOS version was delayed, but Ubisoft did not comment with a reason for the delay. In contrast to Altaïr's Chronicles, the previous title in the Assassin's Creed series to be on these devices, Discovery is a 2.5D side-scroller. Both iPhone and DSi users are able to use their devices' camera function to display portraits as wanted posters in-game. Discovery was released concurrently with Assassin's Creed II and Assassin's Creed: Bloodlines. The game takes place within Assassin's Creed II between The Battle