I guess I’m feeling nostalgic again for those innocent middle-school days. I saw some X-Men: Mutant Massacre comics on sale on Ebay and was reminded how much I loved that series. I had a subscription to X-Factor at the time, which was a spin-off featuring the five original X-Men. My cousin got the X-Men comics. Once the Mutant Massacre series started we had to borrow each others books to keep up, since it was a crossover series between the two teams. Thor, Daredevil, and some lesser known comics were also involved in a minor way.
The series had a certain mystery noir to it, and it was released around the same time as Elektra: Assassin. A lot of the action takes place in the underground tunnels of New York with a band of assassins killing the mutant community that lives in the tunnels. The continuing storyline over eight issues or so, and the, what seemed at the time, more mature action and theme grabbed me. Characters were getting killed and some favorites were gravely injured. That’s serious stuff for an eighth-grader in the 1980s. Remember, there was no internet and no violent video games.
Wikipedia-Mutant Massacre, Marvel Gallery