35 days ago, all Hell (or possibly something even more alien and sinister) broke loose in the city of Rochester, New York, and its surrounding suburbs. This came to be called the 'Rochester Outbreak'.
Within 24 hours, Martial Law had been declared in the State of New York, Rochester was quarantined, and every US Army National Guard and US Army Reserve Unit within 150 miles (plus several from outside that radius) had been called up. A news blackout about what was going on in Rochester was enacted.
Within 72 hours, two full Brigade Combat Teams of the 82nd Airborne Division (that being all that was still in the US with ongoing deployments) supported by the 82nd Combat Aviation Brigade, along with several various units of US Special Operations Forces, had deployed to the Rochester 'Quarantine Zone' to "contain the situation". At this time, the White House declared that "a devastating bio-chemical weapon was deployed against Rochester and its surrounding area by unknown actors"...and everything to do with what is going on in the Rochester Quarantine Zone is classified Top Secret as part of Special Access Programs RAMPANT HART and/or BLUE VARSITY.
It still took another 25 days to restore order to most of Rochester and its suburbs. Reinforcements from the 101st Airborne Division (also giving up two Brigade Combat Teams, the Combat Aviation Brigade, the Sustainment Brigade, and the Division Artillery), 10th Mountain Division (Division Headquarters & Headquarters Battalion, Division Artillery, Combat Aviation Brigade, Division Sustainment Brigade), Vermont National Guard (86th Infantry [Mountain] Brigade Combat Team), and every other New York Army National Guard unit not already deployed to the Rochester area, as well as those New York US Air National Guard units with "relevant assets" were deployed there within another week from the deployment of the 82nd Airborne Division.
At 25 days after the 'outbreak', the United States Government, at the direction of the President, had set up a joint-agency task force to review all available information and determine what focuses a follow-on, "boots-on-the-ground" investigation should look into. This group is fully read into RAMPANT HART and VARSITY BLUE, and is called the 'Rochester Incident Study Group', or RISG (pronounced "riss-gee"). In reviewing all collected information, the RISG focused on various intelligence collected by "technical means" (probably by the NSA using domestic wiretaps), as well as fragmentary reports surviving from before the 'outbreak' and interviews with the few surviving local and federal law enforcement personnel working in Rochester and its suburbs.
At 32 days after the 'outbreak', the RISG delivered its findings to the United States National Security Council. Several orders were immediately issued, and various personnel gathered and briefed within 24 hours.
Those personnel were you. All of you are United States Government employees or contractors, from a wide range of agencies and professions, and possess Top Secret/SCI clearances. All of you were awoken in the middle of the night within the last 72 hours, allowed to hurriedly pack work-related materials and enough clothing to last ten days, and rushed to the Rochester Quarantine Zone Command Post in Batavia, New York, to be briefed by the RISG. You have--after two days of waiting around, being issued equipment, given full medical work-ups, and having thorough psychological dossiers compiled--finally been called in for your actual briefing by the RISG.
Mechanics
This game is essentially a hybrid of Call of Cthulhu 7th Edition in a modern setting and Delta Green, and will be using elements from both. There are unique modifications in use, mostly in regards to PC Generation and the Skills in use. That being said, the Player Characters ARE NOT members of Delta Green, although they will be members in good standing of the United States Government with fully-valid Security Clearances, or at least Cleared Contractors with fully-valid Security Clearances. All of your PCs will have had at least one brush with the Mythos, thus start with Cthulhu Mythos 10% and a maximum Sanity 90.
You will, as the above states, start your campaign by being deployed to Rochester, New York, USA after it has been overrun with the Mythos and then reclaimed by the actions of unknowns as well as many thousands of US Military and Law Enforcement personnel, plus disaster relief personnel. It is not, however, fully safe yet. Your PCs will actually start the campaign arriving to be briefed by the RISG in the Rochester Quarantine Zone Command Post in Batavia, New York.
Everyone will generate at least one PC; you are welcome to generate two PCs, whichever one is not initially selected will be used as a spare for when if your first PC is joyously struck down by an amused GM succumbs to the hazards of the investigation. If your PC dies and you do not have a back-up PC ready by that time, you as a Player will be shifted to being a Reader and another Player recruited. As long as you have a back-up PC ready, you will continue to play, barring other issues.
The inspiration for this campaign comes from the epic and entertaining story of Old Man Henderson, helped along by things such as the Monster Hunter International series, the Special Circumstances series, the Taken movie series as well as the Taken mini-series, plus several other influences I probably haven't noticed.