Here's a dark one I found on my HDD

+1 - My Good Laugh for the day - Thanks

On a more serious note, I thought this one was pretty cool: http://www.wallpaperweb.org/wallpaper/space/space-34041_1920x1080_34041.htm

Is Alice with her Vorpal blade coated in blood dark enough for you? It's been my laptop wallpaper for a good while now.

Sure, the widescreen version is 16:10 rather than 16:9, but you could either accept he slight stretching or cut it down yourself.

Try browsing Deviantart?

since im not a paying member of DA im unable to search for certain resolutions its a general 20 result random search via sections or keywords. Alice is nice, cant wait for the new game. And i have high hopes after McGee mentioned at a press release he wants the original Alice available to everyone prior to the release of "madness"

its based off of one of the quake engines so i dont see a terrible issue getting it to work on modern day systems... Q1-4 all run great on 7/64

You can try Wallbase (possibly nsfw).

Also, these:

Dark in terms of colors or dark in terms of the theme of the image? There's some nice GW2 wallpapers that have a dark theme to them, but most of them have of lot of white.

http://www.guildwars2.com/en/media/wallpapers/

They also have more wallpapers in the profession and race pages. Also made a few wallpapers out of the 1080p version of their first trailer. Attached to the post is a crappy low-quality version of my favorite (the not-so crappy version was obviously too big to upload to the GOG forums)

Don't really have any wallpapers that use mostly dark colors unfortunately, well apart from a Shodan one that can fit pretty much any screen because it's mostly black.

Very Nice, thank you... Awesome collection, my job thanks you for the NSFW

To avoid the redirect simply use the Noscript plug in for your browser of choice. That said, I don't know how many browsers it supports now. But there should be an alternative for most browsers I'd have thought.