Yep, I played about trying to get them to work but had no luck. I put together a basic UI layout using the perk menu controller and all associated widgets which showed up just fine, and even read the relevant stats but I think the bit of code that gets them to trigger does not work. You can even define perks in the media\perks folder.

Perhaps it was to be used once you had reached level 100 or some other condition? Maybe worth asking on the official forums and see if one of the devs can throw any light on it since there's not much on the official wiki either.

I think that either the code is incomplete (seems unlikely given how much of it exists) or we just haven't figured out how to get it working. I ended up abandoning it out of frustration.

Kva i *think* i saw a mod before that does something close to what you described. I'll try to find it...

Maybe you mean this one?

http://forums.runicgames.com/viewtopic.php?f=47&t=58327&hilit=bestiary

or this



I think I need a hybrid of these  mods. 

Actually those mods above are very different

What perks do is give you some kind of special bonus but you can only have one perk 'active' at a time. The perk menu controller in the UI layout is what lets you swap the perks between which one is active or not.

The problem is, I can not get the perks to trigger so that they become active in the first place and this is where I got stuck.

Some examples of perks;-
Filthy Lucre - Converts each point of Fame earned into gold.
Bounty Hunter - Receive a cash reward for any monster slain.
Armor Master - Lowers all Armor requirements by 1 point.
Arms Master - Lowers all Weapon requirements by 1 point.
Desperate Rage - When your Health drops below 25% you inflict double damage.

I guess they thought that passive skills were much more preferred, but I still think perks would be a good feature for end-game characters in the same way they added Paragon levelling in Diablo 3.