Mortal Kombat Trilogy on PSP is significant not only because of its improved graphics and gameplay but also due to its impact on the series. The game marked a turning point in the Mortal Kombat franchise, as it was one of the last games in the series to feature 2D gameplay. The game's success paved the way for future Mortal Kombat games, which would go on to adopt 3D gameplay.

The character roster in Mortal Kombat Trilogy is diverse and extensive, featuring many of the iconic characters from the series. Players can choose from 15 characters, including some new additions, such as Rain and Noob Saibot. Each character has their unique abilities, strengths, and weaknesses, making the gameplay experience varied and exciting.

The PSP version of Mortal Kombat Trilogy boasts improved graphics and smoother gameplay compared to the original release. The game's visuals are vibrant, with detailed character models and environments. The gameplay is fast-paced and responsive, making it a joy to play.