Grim Fandango, sadly not on sale digital :(
Max payne 1, 2 and 3

I consider Nocturne to be a Noir game.
I Also consider the Ripper game to be noir...But that's just me!

Or not?

Besides Bladerunner, these two classics can't possibly be left unmentioned:

-Syndicate
http://www.gog.com/game/syndicate

-Shadowrun
http://www.mobygames.com/game/shadowrun

And the ninja thread wasn't dystopian or noir-ish enough lately? Frozen chicken guts? Warehouses full of them? I mean really? ;-D

~You guys gotta play more games or maybe something else but what, I'll never say ;-p~

On GOG:
Shadowrun Returns

Off GOG:
Emerald City Confidential It used to have a Mac version as well, but that poofed a few years back. I'd love to see this one on GOG especially since it was made by Wadjet Eye, unfortunately PlayFirst owns the rights.
Penny Arcade's: Rainslick Precipice of Darkness 1 and 2 I haven't played 3 and 4, so I don't know if they follow through with the detective flair. 1 and 2 definitely have that vibe going on.

Is BloodNet good, The only review there is a 5 star (sigh) review by someone who played the demo years ago.

Well, if Snatcher is dystopic/noir, Policenauts also can be called as such.

I got a sudden craving to install Anachronox or Blade Runner, I think I will do that after I beat Broken Sword 5. :D Woo woo, time to rock this...oooh wait I need to beat the game of Grim Fandango I started last month. Okay Broken Sword 5, Grim Fandango, THEN Blade Runner or Anachronox. I think I need to make a list at some point in the future, yes indeed. So many good games listed here, I can't wait to see what others suggest! :)

Blimey - quite a few to add to the list in one form or another when I've properly woken up!

Can't see much info on the games through that link - how is it they're dystopian and noir (I've not played them)?
I can definately see a dystopian theme there, not sure about the noir, so I'll add it to the "Should interest" section of the list.
Haven't heard of either I'm afraid.
I'll add both to the "maybe qualify" - never got to play Grim Fandango, and Max Payne is definately noir, but I'm not so sure about dystopian

Dystopic & Noir ? That only describes one game for me. There are others that qualify sure, but none more so than Blade Runner. Of course I am biased: it is the best game I have ever played over my 2.5 decade gaming career :) I don't know what it is about it : It's not especially long or even very 'gamelike' but it has an incredibly powerful atmosphere.

Maybe Culpa Innata? Qualifies both as a noir detective-mystery and kind of Huxley-ish pseudo-utopia.

Already listed. :)
Already Listed. :)

Feeble Files is pretty dystopian.
Also, there was this game. Never played it, but if it continues the movie, then it must qualify...

No idea there was a game of that - ripe for a remake maybe!
Will add both.