Ubisoft has said Assassin's Creed: Brotherhood's single-player story will last 15 hours long, but couldn't confirm the length once side-quests are included.
Gameplay mission director Gaelec Simard told attendees at a behind-closed-doors demo of the game at gamescom the approximate time limit for the story.
However, Simard told VG247 in a Q&A afterward he couldn't nail down a ballpark figure for how long it would last when it included side-quests and other things meanderings.
For the record, the game looked completely good. You should go and place £40 for it now.
Assassin's Creed: Brotherhood releases on November 19 in the UK on PS3, 360 and PC.