I know there are 12 to find. I don't know where all are. The only one I could remember was the Zeppelin Crashing one is. It is at the top of the spiraling road the top has a strip of road leading to the top of the hill with eyes where the tree is. Both are near the Drowning Pool location and where you fight Ophilia for the first time. Since that is the location for one of the tabs, figure I say it so that people know where the find one of the tabs. Started this topic so they have an idea where to look for the tabs. All 12 are used in multiplayer if you want to know what each one can do. Wish I could remember where I found each tab is so I could tell more. As you can tell, not quite sure where things are in the world. So I will leave the rest to you guys to post here to help others.
Ok found a map released by the Achivement Hunters
has been put out.
The one near the skull is the Zeppelin one.