As a departure from Revisions 2 and 3, this milestone will focus on lightsaber mechanics. There will be a new Duel mode feature where players duel each other to earn credits and rank up. It will function similarly to JKA's Duel Mode, but the spectators may bet on winners. Revision 4 also deals with balancing saber vs gunner mechanics. Lightsabers will also be added to shop vendors and available in regular FFA/TFFA matches.