Since the individual stealth seems to make it potentially more worthwhile now, I was experimenting a bit with the Rogue's Backstab ability to get a feel for it. I was wondering about the exact mechanics of it though, since I encountered some unexpected results. I didn't find a full answer in existing threads, so I thought I'd ask.
Firstly, when attacking from stealth at the beginning of combat the Backstab seems to trigger for the first two attacks, rather than just one. This doesn't seem to have clear time limit as it even worked with a crossbow, reload time and all (I tried a pistol as well, but the Spear Spider I was experimenting on kept dying on the first shot). Is this a known feature? And would it still apply if the second attack was aimed at a different enemy? I would expect not since clicking Cancel after the first attack and immediately reattacking the same target stops a second Backstab, but I'm not sure if that would also happen if the second attack at a different target was automatic.
Secondly, when applying a special attack (Blinding Strike, in this case) the backstab doesn't trigger; this is known, going by previous threads. However, when using two weapons this applies only to the attack with the first weapon. The second attack did again trigger the Backstab (in addition to a second dose of Blinding Strike). Again my questions is, is this known behaviour? And more generally, does Backstab have any other undocumented properties of note?