batman-arkham-origins
For the Point Counter-Point achievement you have to complete the Deathstroke battle without missing a single counter. But some of Deathstroke's attacks I cannot block no matter how hard I try. No counter icon comes up, and he hits me no matter what and does damage.
So do these hits count toward the achievement? Do I only have to counter the hits that are possible to counter, or am I not allowed to take any damage at all?
You need to restore the Comms Tower of the district you want to be able to fast travel to. Doing so will unlock the Batwing Drop Point to that area. You can tell if it is unlocked if the icon is white (as opposed to being red).
To fast travel to the location, hover over the drop point icon and choose fast travel option. I play the PC version so that would be Enter (by default). For the other consoles, that would be A on the Xbox 360 and X on the PlayStation 3.
The Glue Grenades aren't available until late in the game. They are given to you after you capture
The Joker
as the main story progresses.
Sionis' Steel Mill is located in the Industrial District, but you won't be able to enter it until the main story requires you to, so finding it before then is not going to help.
Best Answer
Okay, so after a lot of experimenting and practice I finally managed to do the whole battle without taking a single hit! That was one of the most intense battles of my life.
I found that there are two attacks that he performs in his staff form that I thought were unblockable. In one, Slade stands on the ground and hits you three times. I found that with very precise timing, though, you are able to counter that one in between the second and third hit.
In the other attack he hits you three times in quick succession and then does a spin move in the air to deal a fourth blow. The time to counter comes right before he lands the fourth blow, when he is finishing his spin in the air.
It turns out these attacks can be countered, but only if they are countered at the exact right time. If the counter button is hit any other time during the attack, it becomes impossible to counter and he hits you.
Thanks to @Timelord64 for the help and convincing me that none of the attacks were un-blockable :P