The Spartan IV Prototype

It could be the key, to the survival of humanity on Vesta...

The Spartan IV project has been unheard of by hardly anyone, only ONI officials know about it, the files about it is listed as "Top Secret, Eyes Only". The only known Spartan IV  is Ryan, but he and all that was known about the Spartan IV Program was erased due to the Abandon Protocol. During the time the Spartan IV Program was initiated, the Spartan II's and IIIs were just being brought into the program. There were  Spartan IVs, Mostly stationed onboard the UNSC Infinity, but Ryan is the only one listed as a "Guard". Ryan was originally an ODST, but Volunteered to the test subject.

The Spartan IV  was made for heavy combat and stealth alike. The most common Spartan IV helmet is The Recruit Helmet, but it was heard that the Spartan had the choice of the Raider, Mark VI (with assets of the Mk. VII), Warrior, or EOD armor. Ryan, the only known Spartan IV Prototype, had picked the Recruit armor that had the minor additions from the Mk. VII, which became the precedent for all new Spartan IV's to wear.

Petty Officer Ryan Sander and his  armor were tested for efficiency and combat, and also making sacrifices, staying behind on Vesta was one of them. The shield system is similar to that of a Spartan II and Spartan III, but slightly stronger. The Prototype Spartan IV armor and its user is noted to have much more strength than an average Spartan II or III...But are less disciplined....