Searching for Chivalry: Medieval Warfare specifically for the Xbox 360 (XBLA/Arcade) on JTAG or RGH consoles typically leads to community-maintained archives and specialized forums.
If you're looking for a solid story Chivalry: Medieval Warfare Chivalry Medieval Warfare -XBLA--Arcade--Jtag RGH-
For enthusiasts running JTAG/RGH modified Xbox 360s, this title is a must-have in the digital library. Here is a look at what made the XBLA port unique and why it’s a staple for the modding community. The Console Transition Chivalry Medieval Warfare -XBLA--Arcade--Jtag RGH-
If you want, I can: