Microsoft and Capcom released several title updates for Resident Evil 4 on Xbox 360. The most important is (TU1), released in late 2011 / early 2012. It fixed:
The Xbox 360 updated version of Resident Evil 4 refined the gameplay mechanics, making it more polished and responsive. The game's controls were tweaked to accommodate the updated graphics and gameplay. The updated version also included:
Later, Microsoft released Resident Evil 4 HD as a title. This digital version includes TU1 by default. Some forum users refer to this as the “updated ISO” because it can be converted from a GOD (Games on Demand) container back to ISO format.