Resident Evil 4 HD will be the first to arrive in stores and on Xbox Live Games on Demand for a price of £15.99/$19.99 in the shops and 1600 Microsoft Points for download. It'll be available from September 20th in North America and Europe, with Resident Evil: Code Veronica X HD to follow the week after on September 27th in North America and Europe for the same price tag.
Both games include all of their bonus content too, with Code Veronica X being the definitive PS2 version of the Dreamcast title and Resident Evil 4 including the PS2 release's extras such as Ada Wong's 'Separate Ways' epilogue campaign, check out below for gameplay videos of each game
(ps all i seem to be doing is posting videos nowadays)
