I'll be honest. I have a definite bias in favor of Delta Green. And, if for the only reason that the timeline of the setting will finally be pushed past 9/11 and into the new century, I support a new iteration of Delta Green.
Many, many years ago, when I was still living in Cleveland, I went one day into a newsstand/magazine shop (something that you don't see very much of anymore) and I found something peculiar. I found a gaming zine. A. Gaming. Zine. I had heard of this zine in passing because it actually shared a printer with another zine that I bought when I could, the official Cyberpunk RPG fan magazine called Interface.
I could go on about Interface, but it is only tangentially connected to the story at hand. The other zine was one that focused on Lovecraftian material, and had quite a bit of support for the Call of Cthulhu RPG. This magazine was called The Unspeakable Oath, and it was published by some people who called themselves Pagan Publishing. This particular issue of The Unspeakable Oath was interesting because it was a sort of cross over between it and Interface. There weren't any articles or characters that crossed over, just concepts.
See, as I said these people all shared a printer. While working out having their respective zines printed, the creatives from both of them met. This lead to talks about the thematic similarities between Cyberpunk fiction, and the Chtulhu Mythos fiction that H.P. Lovecraft and his circle of writers spawned. So, they decided that they should cross pollinate in their zines.
Interface had an issue that brought the Mythos into the realms of the Cyberpunk RPG. It was an interesting piece, and I won't lie...I used material from it in a Cyberpunk campaign of mine once. It was well written material. The Interface issue is currently in a box in storage, and I hope to see it again one day soon.
The issue of The Unspeakable Oath had something pretty cool in it too. It had a modern day (modern day to when the issue came out) Call of Cthulhu adventure featuring government agents investigating a UFO siting that, unfortunately for the investigators, turns out to really have to do with the Mythos. This adventure was the first time that Delta Green made a public appearance. It was an awesome adventure, and for someone who enjoyed Cthulhu, conspiracy and weird alien shit in my gaming it was as if doorways opened up in my mind. I wanted...I needed more.
Keep in mind that The X-Files hadn't aired yet at this point.
I'm not sure how much later it was but the people at Pagan Publishing put out an immense setting supplement for the Call of Cthulhu RPG called (you guessed it) Delta Green. It had all sorts of options for running a Call of Cthulhu game in the modern era (a time period that Chaosium mostly stayed away from in favor of the eras of Lovecraft's fiction). It was great. Then, a bit later, they put out a supplement for their supplement that was bigger than the initial book. Delta Green: Countdown expanded the world and the conspiracies in it. The writers expanded the role of the Mythos god Hastur, and talked more about Robert Chambers' eerie King In Yellow. These books were some of the best things ever written for the Call of Cthulhu RPG.
Now, it isn't a secret that the once and former Chaosium wasn't a paragon of professionalism. So it shouldn't come as a surprise that when we fast forward to today that the people who have been publishing Delta Green material all these years might want to be able to have more control over their game and what they publish, and not be at the whims of Chaosium's nature. Note that this is just conjecture, and not based on anything that the people at Pagan Publishing/Arc Dream Publishing have ever said, but knowing the hole that the previous Chaosium had dug for itself, it honestly wouldn't surprise me.
This isn't the first crowdfunded Delta Green book (I have two books that they put out before Kickstarter existed), and I doubt that it will be the last. However, if you are a fan of any of the things that I have talked about in this post, you really should get out there and support the Delta Green Kickstarter. These people have consistently done some of the best Lovecraftian RPG material on the market, and with your help they will keep on doing it.