Omg hell climbing? Wtf is dat? Haxxor.
Yeah, enough people have called me a hacker for hell climbing...so I'm gonna share this incredibly easy skill so you guys can get called hackers too...;)
Anyways, change your Alternative Fire to F. You can still keep it as F and Right Click.
THen, get your melee weapon out, (dagger preferable) and jump towards a wall holding F. Then when ur on the wall, hold w and spam space and left mouse button.
It's not that hard..:O
Now everyone can do this weird glitchy-looking move! hooray! :D