MASON System

The MASON system is first introduced at the beginning of Turnabout Succession in Apollo Justice : Ace Attorney, although it does not actually become playable until the final part of the case. It is an element of the new Jurist System and in the Ace Attorney universe, resembles a video game where the player must traverse different locations across two different time periods, seven years ago and the present day.

Both the jurist and the player take on the role of Phoenix Wright as he attempts to piece together events in both the past and present. It is very similar to the investigation chapters with the exception of the "Move" option being replaced with the "End Search" option instead.

A strange effect of the MASON system is its ability to create time paradoxes. In order to move forward, certain items from the present must be retrieved and presented to people in the past.

This is also the only part of Apollo Justice where Wright's magatama can be used.

At the conclusion of the MASON system, the jurist and player is required to choose a verdict, which determines the ending of the case.