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Unlike the spotty backwards compatibility available on Xbox 360, which required a custom wrapper for each individual game, Microsoft has taken a more extensive approach through the use of a virtual machine that runs on the Xbox One as a game in and of itself. This virtual environment includes the Xbox 360 OS features, though they remain unavailable to the user, enabling the software to behave as if it is running on original hardware. The Xbox One then views this "Xbox 360" app as its own game allowing features such as screenshots and video sharing. The emulator supports both digital downloads and original DVDs, though discs simply act as a key, the core data downloading over the internet via Xbox Live.
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Kameo was one of two Xbox 360 launch titles from Rare and remains a lovely game to this day. It's also one of the best performers in the entire roster of backwards compatible titles, with a near flawless presentation. The frame-rate during our test held rock solid at 30fps, just as we had hoped, and all of the lovely lighting and textures are present and accounted for. It feels every bit as solid on Xbox One as it does on Xbox 360. Of the titles we tested this is the virtual machine working at its best, producing the most accurate 'emulation'. Status: Virtually perfect.
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It should be noted that as an early title on Xbox 360, Mass Effect suffers from rather egregious tearing, severe texture pop-in and serious frame-rate issues - all issues which were improved in subsequent games. The results on Xbox One are very interesting and a little unexpected.
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Mass Effect: As it stands, during both exploration and combat sequences, the game runs upwards of 30 per cent slower on Xbox One with a deviation ranging between 5-10fps at any random point. What was already a sluggish experience on original hardware becomes nearly unplayable at points on Xbox One. During an explosive encounter during the train sequence in the first mission, we encountered dips as low as 10fps. We suspect that forcing v-sync is to blame for the drop in performance, though CPU inefficiencies seen in many early Unreal Engine 3 titles may also be an issue. We'll be eager to see how the virtual machine evolves over the coming months and we can't wait until other Unreal Engine titles become available for testing, but for now, this is not the right way to experience the game. Status: Sub-optimal and nearly unplayable in places.More at the link http://www.eurogamer.net/articles/di...ty-on-xbox-one
