Within Marvel Comics, most tales take place within the fictional Marvel Universe, which in turn is part of a larger multiverse. The main continuity in which most Marvel storylines take place was designated Earth-616. This campaign takes place in Earth-1274.

Advanced Idea Mechanics
The Avengers
Avengers Identicard
Avengers Mansion
The Big House
The Cube
The Fantastic Four
The Helicarrier
Heroes For Hire
Hydra
Just A Really Very Intelligent System
Quinjet
The Raft
S.H.I.E.L.D.
The Vault
The X-Men