They select a Backstory and Profession which gives their character Traits that will impact gameplay.
Depending on their Rank players will then be able to select an additional amount of Traits and Powers.
Players will also be able to put points into different ability scores, consisting of Melee, Agility, Resilience, Vigilance, Ego, and Logic.
The sum of the three dice are added together and further augmented by character statistics, then compared against a difficulty number.
Cody Pondsmith for Polygon named MMRPG the best tabletop role-playing game he played in 2023, saying that "The game is utterly devoted to giving the players the feeling of playing a hero in the Marvel universe with tons of cool powers and power categories based on key Marvel heroes like Spider-Man and the Hulk.