Ubisoft kept us hanging last year about whether Rainbow Six Siege would have a single player. Thankfully, today, during the press conference, Ubisoft confirmed thatit will feature a filled out Terrorist Hunt mode that can be played in co-op or single player:
In Terrorist Hunt, the enemy AI is given time to build a stronghold in a map and then you have to find a way to breach it and clear them out. In Siege the AI will be a lot more aggressive than earlier games and will use the environmental destruction against you.
Classic Terrorist Hunt will make a return, along with three other Terrorist Hunt modes.
Siege will have a beta release on September 24th, 2015.