Has any1 used the Punch Through Wall arm aug?
So far I think I've only seen 1 instance where it could be used
Yes, and its definitely worth getting, i think you can still blow open walls with grenades and such(but i haven't tried it). There are 2 points that i know of in the game where smashing through a wall gets you a praxis kit. Its only one point to spend and you can even get free kills if someones behind the walls, you dont get any xp for it though.
Its also one of the anilities you have to get to unlock the recoil aug, which depending on what weapons you use can be pretty handy
Can i just jump into this game without playing the others?
This game is set before the others so you wouldn't be missing out