Found the article on the PC Gamer site http://www.pcgamer.com/2013/06/02/mod-of-the-week-ultimate-difficulty-for-dishonored/

And from here it can be downloaded http://www.ttlg.com/forums/showthread.php?t=141188

It increases enemies' perception and attack speed, reduces leaning angle, deletes bodies per level limit.

To quote the author:

"Stealth: Harder
1. Enemies are more alert and persistent.
2. You make more noise and are easier to see.
3. You can no longer lean like a boss.

Combat: Risky
1. The world no longer stops for you during combat.
a) Except during assassinations. This causes problems if a target gets
involved in a brawl.
2. Enemies wait less time inbetween attacks & blocks.
3. Offscreen damage is now equal to onscreen damage.
4. You can be stunned for longer.
5. Enemies attack in greater numbers.

Graphics: Cleaner
1. Bodies pile up
2. No intro movies"

Kudos to the creator Joseph jdv!

I was just about to post this, good find .

Hopefully I can give it a go sometime. I'm glad to see they've reduced the time it takes enemies to recover from a stagger; it made the combat a bit easy in the main game.

It's good that modding started, though it, probably, will be limited to ini. files tweaking.

I'm too unsure if I'll instal it now. Leaning was indeed too much of a cheat but I do not know if I want harder fights. I'm trying some more creative ways of killing lately, and it is not possible with too many foes. Also I can create myself problems even in vanilla. On high chaos I just jump merrily in between a bunch of guards and try to take all of them (and a couple reinforcements) at once. But yeah, I'm also just not that good of a player.