CUSTOM MECH WARS ULTIMATE EDITION is a large and luxurious edition that includes the main game and "Earth Defense Forces" series collaboration contents, as well as a total of 70 anime game collaboration accessory parts and a custom voice that allows users to change the navigation AI voice to a special version.

The EDF collaboration content includes 10 additional missions. the EDF mech part sets: Barga, Balam, Nix, Combat Wagon and EMC along with accessories from the EDF emblem set.

The anime collaboration content includes heroine camouflage and decal accessories with 7 from SAMURAI MAIDEN, 8 from BULLET GIRLS, 7 from OMEGA LABYRINTH and 13 from DREAM C CLUB along with the custom voice options Enthusiastic voiced by Nobuyuki Hiyama, Young Lady voiced by Kikuko Inoue , Rich Lady voiced by Hekiru Shiina and Berserker voiced by Tomoko Kaneda.