[4K] Metal Gear Solid 5 PS4 Pro Patch Tested: What Does It Actually Do?

Tom and Rich sit down to discuss the new PlayStation 4 upgrade to Metal Gear Solid 5. It's a three year old game and this patch has come out of nowhere - but are we looking at a barebones 1440p upgrade or something more special? Subscribe for more Digital Foundry: http://bit.ly/DFSubscribe