If you were to walk into an arcade fifteen years ago, chances are you’d find a group of hardcore fighting game players huddled around a Marvel vs. Capcom cabinet. This classic fighter wasn’t just popular during its heyday, it defined a genre for an entire generation of gamers during its tenure on top.

From its infancy in titles like X-Men vs. Street Fighter to its dominance of the fighting game landscape with Marvel vs. Capcom 2: New Age of Heroes, the series has continued to grow with each additional entry. The love gamers have for the series, however, isn’t restricted to the tight gameplay and flashy combos of its battles. The series has truly become legendary in the gaming community for its hidden secrets and easter eggs.

With word of a new game taking the internet by storm, now’s as good a time as ever to take a look back with 15 Things You Never Knew About Marvel vs. Capcom.

15. Marvel vs. Capcom’s “Dramatic” Origins

ryu and ken dramatic battle 15 Things You Didnt Know About Marvel Vs. Capcom

The Marvel vs. Capcom series has gone on to become one of the most dominant players in the fighting game scene, but the whole thing actually started out as nothing more than a small easter egg. The first game in the Street Fighter Alpha series featured a special secret inspired by the Street Fighter anime, the ending of which showcased a two-on-one fight of Ryu and Ken against M. Bison.

The game sought to recreate this moment for players with its secret “Dramatic Battle” sequence, allowing a pair of players to fight the tyrannical Dictator at the same time. While this two-on-one battle seems fairly tame today, for gamers in 1995, it was a revolutionary feeling to utilize multiple fighters at the same time. Capcom instantly recognized that they had something special on their hands with the team-up concept, and would immediately begin work on a new project. This eventually became X-Men vs. Street Fighter, and the rest, as they say, is history.

14. Ruby Heart’s History

Ruby Heart in Marvel vs Capcom 2 15 Things You Didnt Know About Marvel Vs. Capcom

Contrary to popular belief, Marvel vs. Capcom 2 does indeed feature a plot as well as original characters. Although, like most fighting games, it isn’t exactly the most complex storyline ever written. Basically, the game’s big bad, Abyss, brought some dark energy to the universe and a certain French pirate on an airship came to stop it.

Ruby Heart was never the most popular character during Marvel vs. Capcom 2’s glory days, but she was a mysterious gal that most people didn’t know much about. In a game crammed full of fan favorite characters, the sight of someone making their video game debut made for a multitude of conversations and questioning.

According to Capcom’s Seth Killian and Yoshinori Ono, Ruby Heart was actually based on a rejected Darkstalkers character design. Her legacy continues today, with the introduction of a new Ruby in Street Fighter V, another female pirate who bears a strong resemblance to the original Miss Heart.