[Shinobi Killfist]

If you can figure out where they are...

But if you failed to 'notice' (it actually say 'notice', and not 'see') them with a perception test then you are in the blind about their location, yes...?

Rather than taking a blind fire modifier minus 6 dice and just fire when you cannot see (which was stupid when you had people with 20+ dice pools) in this edition it seem as if the test will automatically fail instead (which make much more sense). I don't see how this should not apply to subjects you cannot see (because they are successfully sneaking in the shadows or are invisible or because you are currently being blinded by a flashpak or whatever the reason might be).

Either a slight dice pool penalty or a "He gets Edge instead of you" approach works for "I know where you are, but technically can't see you" cases.  My point is: it's not legislated specifically because there's so many "well what if's" that it's all just left to GM discretion.

If you for example activate the sprinkler system to let you see the outline of the character as the drops hit his invisible body then I would give the you a 'Blinded II' modifier to hit him, but if the character is invisible and you failed your perception test to 'notice' him (but also if the character is sneaking and you failed to 'notice' him) then you in the 'Blinded III' category and just shooting in a random direction will not really have any chance to hit him at all.

For most people. But people with enhanced hearing or other senses might fail a general perception test so they can’t see him but make a hearing specific one, or just have a good guess based on the invisible dudes last action.(mechanically maybe too easy since you can only move once I’ll have to reread the section, can you continue your move while attacking?). Would this be more like a auto miss a blinded 1 or 2 or a edge.

[Xenon]

Maybe if you use an AoE attack of sorts aimed at a general location, but closing your eyes, listening for footsteps in the vicinity and use that (and nothing else) to double tap him...? I don't know...


If you have access to ultrasound then you not only 'see' the invisible target, you also gain a tactical advantage when attacking him

[MercilessMing]

Yeah, if you get enough hits to meet the threshold set by #, then the invisible (improved) condition is completely resisted by the attacker. If not: GM call based on circumstances in play.

How do we know the condition is completely resisted, as opposed to "can notice but still invisible"?  Important because either you can make the attack with no penalty from invis, or you can make the attack but the defender still gets an Edge from being hard to see.

[Stainless Steel Devil Rat]

Yeah, if you get enough hits to meet the threshold set by #, then the invisible (improved) condition is completely resisted by the attacker. If not: GM call based on circumstances in play.

How do we know the condition is completely resisted, as opposed to "can notice but still invisible"? 

The GM knows.

The rules don't need to spell out difference between "failed to hit the threshold, and has no idea you're around at all", "failed to hit the threshold, but knows you're here but not where", and "failed to hit the threshold, but still knows right where you are because of environmental cues".  GM discretion is the easiest and most reliable way to legislate those differences.  In certain cases, like say a guard dog, simply being able to smell you and using scent as its primary sense might mean that being invisible means literally nothing at all to its attack.