The Delta Plus was a prototype Transformable Mobile Suit (TMS) developed by Anaheim Electronics. Based on the development plan of the MSN-001 Delta Gundam, the Delta Plus incorporated technologies from the Zeta series of mobile suits, as well as operating data from the MSN-00100 Hyaku Shiki. It was developed as an all-purpose attack machine, capable of operating both in space and in the atmosphere. Like the MSZ-006 Zeta Gundam, the Delta Plus was capable of transforming into a Wave Rider Mode with the ability to enter the atmosphere unassisted. The Wave Rider Mode's thrust was high enough to not only achieve atmospheric flight, but also serve as a Sub-Flight System for another mobile suit under 1G of gravity.
The Delta Plus adopted a unique layout that concentrated all of its thrusters on the lower body and had no thrusters on its back. Its legs, which functioned as the main thrusters in Wave Rider Mode, were only equipped with minimal armor. This was because it prioritized mobility over durability, a design concept proven by the Hyaku Shiki. Its head sensor adopted an updated version of the IDE (Image Directive Encode) System used by the Hyaku Shiki, with scan lines appearing on the sensor when activating or switching between modes. Like its predecessor, it had a pair of dual eye sensors deep underneath.
The Delta Plus was developed by Anaheim Electronics in U.C. 0090, at the request of the Earth Federation Forces. A small number of units was subsequently produced.