Unlike retail disc games (ISO/GOD), State of Decay was distributed as an XBLA file. On a JTAG/RGH console, these are typically placed in the Content\0000000000000000\ folder to be recognized by dashboards like Aurora or Freestyle Dash.
Use a custom BIOS or patch that forces the game to read the system timer directly from the hardware rather than the altered CPU clock. State of Decay -XBLA--Arcade--Jtag RGH-
provides specific benefits over the standard retail experience: Loading Times: Unlike retail disc games (ISO/GOD), State of Decay