The ASW-G-35 Gundam Marchosias (ガンダムマルコシアス?) is a mobile suit introduced in the Mobile Suit Gundam IRON-BLOODED ORPHANS Urdr-Hunt mobile game.

One of the 72 Gundam Frames created during the Calamity War about 300 years ago. The Gundam Marchosias' unique natural frequencies were recorded in an old database owned by Gjallarhorn, confirming its deployment in combat. The Gundam Marchosias' wing-like binders on the back give off an elegant presence. However, four sub-arms were installed into the binders on the back and waist that can be unfolded when lunging toward enemies, resulting in a demonic appearance truly suitable for the Gundam Frame units which were named after demons.