Does Mortal Kombat: Armageddon (Xbox) Work on Xbox 360?

No. Mortal Kombat: Armageddon for the original Xbox does not run on Xbox 360.

Reason

• Original Xbox games require specific backward compatibility support on Xbox 360.
• Mortal Kombat: Armageddon was never added to the Xbox 360 BC list (only ~40 original Xbox titles were).
• Different hardware (x86 vs. PowerPC) prevents direct execution.

How to Play It Today

• Original Xbox: Disc + working console (softmod for HDD play).
• PS2 / Wii: Native ports (PS2 best; Wii has motion controls).
• PC Emulation: Xemu (original Xbox), PCSX2 (PS2), Dolphin (Wii) – all playable at 4K/60fps on modest hardware.
• No Modern Port: Not on Steam, GOG, Xbox One/Series BC, PS4/5.

For the Kreate-A-Fighter and massive roster, PS2 via PCSX2 is the definitive experience.