The For Honor campaign had the potential to really be something special, but, unfortunately, it just wasn't. It was plagued with a nonsensical story and absolutely horrible voice acting.
The promotion of the game was centered around the fact that three factions -- Knights, Vikings, and Samurai -- are at war,
so you'd think that we'd get some explanation as to why in the campaign, but we didn't. Everything about the campaign was lackluster, especially the ending.
To be fair though, the campaign wasn't the game's big selling point. In fact, it's quite clear that the developers treated the campaign as an afterthought because it's listed below multiplayer in the main menu. So, that's why it's at the bottom of this list. But, it could've been something special.