Guild Wars 2

Many have already suggested adding capes instead of just having guild backpacks, but no one in this forum has suggested a sashimono (a banner worn on the back of armor).

It would look great for heavy armor characters, especially a banner oriented warrior. Also it makes more sense to have a guild symbol on a banner more so than a backpack.

that makes me think of warhammer 40k actually

Wow, you are absolutely right…can’t believe that wasn’t my inspiration for this idea in the first place. Now that you mention it, the idea of characters wearing banners on their back just became way cooler than I first thought.