Mortal Kombat Trilogy for Sega Saturn combines gameplay and narrative elements from Mortal Kombat 3 while incorporating characters and stages from previous titles, including Ultimate Mortal Kombat 3. It introduces new fighters, the Aggressor bar that enhances speed and strength during matches, and Brutalities, which are elaborate attack sequences culminating in the opponent's defeat.
Mortal Kombat Trilogy features the same gameplay and story as Mortal Kombat 3, but adds characters and stages from the other three arcade games, including Ultimate Mortal Kombat 3. Some completely new characters were also introduced. New additions to the game included the `Aggressor` bar, a meter that fills during the course of the match and temporarily makes a player character faster and stronger. It also features the Brutality, a long combination of attacks that ends with the opponent exploding.