When it was first revealed and demo'd last year, For Honor sounded like it would be a multiplayer Knights vs Samurai affair with a combat system that had some rochambeau elements. During Ubisoft's press conference, it was revealed you could also play as Vikings and that there's now a campaign mode, which you can play with a friend.
Though it was only mentioned as a single-player campaign during the conference itself, the official website for the game reveals a bit more; namely that the campaign can be played with another person locally or online. You can check out the gameplay footage over here, which shows off the combat system in a little more depth. The actual campaign itself will take you on a quest to defeat the warlord Apollyon and save your people.
For Honor will launch next year on February 14 for the PC, Xbox One, and PlayStation 4.