Yeah the wall-idea seems cool, but I think there should also be a Journal Entry where you can check them out too... And equipping your achievements... Imagine huge shield with a picture of smiling Adoring Fan on it... There could be one Shield and when you click one of the Achievement-shields on the wall with it equipped, the picture on that achievement would appear on the shield
Cool eh? But I doubt that'd work. Just the Achievements would be enough for me but that kind of extra is always welcome!
And I might just be able to create shield on Blender, but, I'm reeeaally bad at it. So it'd be really simple one.
If I'm up to it, I'll post in the next couple of days