Delta Green
Now we're on to the question: "What does Delta Green want from you?" Nothing short of the rest of your life. Delta Green wants you to pick up where I left off: doing what I've been doing for the last ten years. I've falsified official reports. Lied under oath. Planted evidence. Stolen and destroyed evidence. Stolen and destroyed federal property. Run illegal wiretaps. Abused the power and authority of my office. Gone AWOL. Committed arson, burglary, grand larceny, aggravated assault, battery, and killed. On three of those occasions, what I did was nothing short of cold-blooded murder. And all in the name of doing the jobs nobody else can or will.
Overview
Delta Green is a horror PnPRPG based of off the Call of Cthulhu system. DG shares the Lovecraftian mythos with CoC, but most strongly differs in that it is specifically in modern times (where CoC was typically set in the jazz era).
Player Characters tend to be part of or somehow affiliated with government executive branch agencies (most typically law-enforcement or military) recruited into an officially disbanded clandestine group whose purposes was to investigate and neutralize occult and alien threats. DG is currently organized in a cell structure with 26 cells with three operators active at any one time.
So...basically, a bunch of the 'federales' grouped up to make a highly illegal terrorist organization to fuck up aliens and occultists.
Did I mention that there's a legit government agency called Majestic 12 who are in bed with what they think are aliens? So yeah, terrorists.
Basics
Go look at the information in Call of Cthulhu, much is shared with some notable exceptions:
- Some skills differ to deal with updates to technology
- PCs are generally more capable at combat; but many many things in the DG universe will hand Operatives their ass
- PCs, to a certain extent, can also call upon the resources/influence of the organization they work for
- Depending on their creativity and ability to come up with "mundane" reasons (you've got to be hella good to divert a B-52 wing and convince them that the town filled with worshipers of the Deep Ones is just a mock city they're supposed to make practice bombing runs on)
- As a PC typically won't have official sanction, this typically involves a lot of lies, inventing evidence, intimidation, and other various tactics to make sure Deputy Fife doesn't make any calls to check your credentials.
The Setting
Essentially, the modern world, but where Cthulhu definitely dreams (as opposed to ours where it's only a distinct possibility). Add into that a boat load of secret cults, secret societies, secret governmental agencies, eldricht abominations, a lot of insanity, and you're almost there.
Oh yeah, notice how I didn't say anything about aliens? Yeah, so those "aliens" Majestic-12 are working with, they're just fungoid constructs by one of the many eldricht abominations floating around who are doing nasty things to humans for their own purposes.
The Big Players
Delta Green
As with any clandestine organization, their history is all kinds of jacked up. DG has existed in some capacity or another since 1928 as a response to the crazy crap found during a raid on a Deep One Cult located at Innsmouth, MA. It is interesting to note that the raid on Innsmouth ended with everything even remotely suspicious being thoroughly dynamited, which remains Delta Green SOP to this day. They changed names a few times and were handed around to various parts of government for a while before they finally coalesced as "Delta Green" which wasn't so much a name for them, but for the classification and access level required to actually know anything about them; however it eventually came to serve as a name, official or not.
During their later years as an official organization, they acted without much of a command structure with people who were in the know just calling each other up anytime they ran across something DG should handle, and then they handled it with little to no oversight. When they screwed up royally in Cambodia during a 1969 raid that resulted in most of the people who participated dying, they finally gave the likes of Majestic 12 and other political enemies an excuse to finally disband them.
This didn't sit well with some portions of DG who quietly got together and said we're going to keep at it. What little oversight and control there was before no longer existed, and as a result many DG operatives executed their self-appointed duties with extreme prejudice. Eventually, one of the DG leaders started looking into MJ-12, pissed them off to the point where they sent their own operatives, DELTA, to assassinate him. This then lead to the decision to reorganize DG into the cell structure used to this day.
Majestic 12
Majestic 12, or MJ-12, was formed in response to the highly publicized Roswell Incident where an alien craft crashed into the deserts of New Mexico. Beyond taking charge of the craft, bodies, and survivor, MJ-12 was responsible for covering the incident up and keeping knowledge of aliens from coming to the attention of the public. It was originally formed with some former members of Delta Green who did not necessarily agree with DG's policy of just destroying everything they came across, wanting to keep some for study and possible use against the USA's enemies. For the most part, DG and MJ-12's responsibilities did not seem to overlap, but from the beginning there was a basic and divisive difference in philosophies.
Over time, MJ-12 managed to finally ended up making contact with what it thought were alien life forms and agreed to cover up their activities on earth in exchange for technology which they slowly filter into the market (making themselves rich) and a vague promise on the part of the Greys (the "aliens") to be put in touch with other intelligent species throughout the galaxy.
The 12 of MJ-12 comes from the 12 members of the steering/oversight committee that runs all of the projects and subprojects that fall in MJ-12's jurisdiction. Each of the 12 members is head of a specific project that relates to either interaction with the Grays, covering up the Grays' activities on earth, and/or exploiting the technological revelations.
Over time, this relationship with the Greys has soured for some members of MJ-12, but they cooperate out of fear of the superior technology that humanity is essentially defenseless against (a nuclear weapon is unable to scratch the material they use to make the hulls of their craft). Other members are blinded by the technological opportunities and opportunities for personal gain.
As MJ-12 is a proper black governmental agency, they have nigh on unlimited access to various resources, be they the finest minds, money, research facilities, etc. They do maintain their own group of operators whose primary task is to use techniques first developed in the CIA's MK-ULTRA and further refined with the "alien" technology and practice to cover up any activity of the Greys. While strongly preferring non-violent means (which are generally less complicated to implement) they are still a highly capable combat unit.
MJ-12 is aware of DG's continued activities, but mostly does not fully consider them a threat. Some members of MJ-12 see DG as a possible way to strike at their enemies within MJ-12 or even possibly the Greys themselves.
The Greys
The Greys are the supposedly alien race who are exploiting the government of the United States of America. They are actually essentially puppets of the Mi-go (an extension of Yuggoth). Long story short, the Mi-go know that all hell is about to break loose because the foretold end times are just around the corner. Among other things, they have a goal to learn everything they can before the get they hell away from the earth (to where remains a question).
To these ends, they had to speed up the research they were doing on humans, but wanted to do such in a way that wouldn't get every government in the world looking for them to kill them. So, they made up the Greys who they control via a strange sort of telepathy and set things up in such a way that they now have the most powerful government on the planet cleaning up their messes willingly for a few trinkets.
Karotechia
Imagine liches. Make them Nazis. Oh, and there's just three of them, but they've got a lot of underlings. Stick them in South America. You've now got the Karotechia. One has to stay in a fridge, one is a merc who just enjoys being a merc, and one thinks the ghost of Hitler is telling him to start up the 'Fourth Reich', but this time base it off of occultism. The last one is crazy as fuck and the other two are scared to death of him, so they play along.
Deep Ones
Fish people that can breed with humans to make strange hybrids that look human until a certain age when they they change and turn into fish people and go off into the water to live with the greater Deep Ones. Ceremonies of worship are orgies of violence and well, orgies. Due to shenanagins by Delta Green, namely setting up pillboxes and landmines, then casting Call Deep Ones, said spell no longer works.
Saucer Watch
A UFO research group that actually has some respectability by both being well funded (by some rich heiress who thinks she was abducted) and actually seriously researching reports of UFO activity, with emphasis on the world 'research'. They sometimes stumble on things MJ-12 would rather they didn't.
The Fate
Occultists based in NYC. The Fate group of very powerful magic users who contract out to criminal organizations. To those criminal organizations, they are known as The Network (the arm that function as a sort of public face for The Fate). Mostly they do such to have access to professional thieves and other less than legal vectors for acquiring specialty items for their rituals, information and the like. Led by a dude named Stephen Alzis who is rumored to actually be Nyarlathotep. They have a lot of connection as well to a night club in NYC named Club Apocalypse.
Other various cults
At any point some other Cthulhu lore cult (such as the Cult of the Yellow Sign) may pop up and become a headache 'someone' had better deal with. All of the various eldricht powers will most likely make some sort of showing before the final curtain falls for some purpose, overt or not. I mention the cults and not the powers themselves, because mostly the PC interactions will be with the cults...well, anyone sane would hope this to be the case...