Batman: Arkham Origins

You get this achievement for defeating Deathstroke. It's a lengthy one on one confrontation that teaches advanced countering.

The first phase of the fight is the easiest. Dish out some combo's and make sure to mix up some stuns and blocks to keep Deathstroke from mounting offense. He likes to counter so make sure you prepare to press (Y) to avoid his combo's (Which usually come in 2 or 3 hits).

At random intervals he will attach a remote grapnel to you and hurl some explosives your way. Hit (Y) before it hits to direct it back at him. Drop your own smoke and quick grapnel before he has a chance to shoot you with his gun. Quickly close the distance to resume the melee confrontation.

After some successful counters he will drop a smoke bomb and attempt a flurry. Simply mash Y to block his attacks and beat him down after he runs out of steam. This will take a large chuck out of his health bar.

After the first beat down his mask will fall away and he will attack more aggressively. You will notice a increase in counters and special attacks but it should play out more or less the same as round 1. After another failed flurry attempt or losing enough health batman will break his bo stick.

Getting his stick broken really pisses off Deathstroke and he starts taking the fight much more seriously by busting out his trademark sword. Prepare for a much different pace and more advanced countering techniques or he will easily out pace your damage output.

It's crucial to mix in everything you have learned by fighting so far in the last section. The counters will need to be quicker (The timing is different and may take a couple of tries to memorize) , you need to dodge and use take downs to keep him reeling. It's also a good idea to abuse Batmans superior agility, avoiding him is quite easy and opens him up to attack. You don't actually need to take his health bar all the way down. After enough punishment Batman will incapacitate Deathstroke and jack his sweet remote Grapnel.

I felt this epic duel was a bit too early in the game but it rewarding nonetheless beating someone on par with Batman's combat abilities.

Tips:

* If you are having difficulty fighting him toe to toe simply wait for him to attack and counter, often countering his counter for a free hit. It's slow but you can virtually win the entire fight this way. This method plays out much like a extended quicktime event with the occasional need to close distance.

* Grapple Pull is your ace in the hole. Use it.