- "I've never much liked the look of the Neo-Crusader armor - but the increased order has been useful. We might even conquer the galaxy because of it."
- ―Mandalore the Ultimate
It was developed sometime after the Mandalorian Wars started, and used almost exclusively by 3963 BBY due to a recommendation made by Cassus Fett, who's also rumored to have had a hand in war production. By that time it was seen in four different colors on the front lines - blue, crimson, gold and silver. Blue was used by generic Neo-Crusaders, and crimson used by Rally Masters, while the golden armor was reserved for the Field Marshals. Silver was used by Neo-Crusader veterans on the front line, called Neo-Crusader Assault Armor.
The armor was seen with many different armor configurations, such as a heavier standard used for the Shock Troops. As the Mandalorian Neo-Crusaders comprised many different species, different designs were employed to fit the wearer. 
Neo-Crusader armor had a couple of functions and attributes superior to the former variety of armors, most notably that it was much stronger and could withstand more force.  It also had stealth field generators to allow the warrior to pass undetected by enemy soldiers.
A set of armor was recovered by the Galactic Republic in the Battle of Myrkr to examine by the Ministry of Defense. A Neo-Crusader helmet was kept by the Trandoshan headhunter Garnac thousands of years later, as part of his trophy collection.
- Star Wars: Knights of the Old Republic: Flashpoint
- Star Wars: Knights of the Old Republic: Days of Fear (Appears in hologram)
- Knights of the Old Republic 17: Nights of Anger, Part 2 (Appears in hologram)
- Star Wars: Knights of the Old Republic: Daze of Hate
- Star Wars: Knights of the Old Republic: Knights of Suffering
- Galactic Republic Defense Ministry Daily Brief KD0092 (Mentioned only)
- Star Wars: Knights of the Old Republic: Vector
- Knights of the Old Republic 49: Demon, Part 3
- Star Wars: Knights of the Old Republic: War
- Star Wars: Knights of the Old Republic (First appearance)
- Star Wars: Knights of the Old Republic II: The Sith Lords
- Star Wars: The Clone Wars – "Wookiee Hunt" (Helmet only)
- Star Wars: The Old Republic
- Knights of the Old Republic II: The Sith Lords: Prima Official Game Guide
- Star Wars: Knights of the Old Republic Handbook
- Knights of the Old Republic 26: Vector, Part 2
- "The History of the Mandalorians"—Star Wars Insider 80