Here is the latest from Matrix Games about the release:
"Here is latest official word:
Hi Everyone
Here is the final release information on UFO: ET with some important changes. The game will only be available from Matrix Games / Tri Synergy in North America (United States, Canada, Mexico and any U.S. Territories (Puerto Rico, Guam etc.). We are sorry for this late change but we only just recently been made aware of this new restriction from the European publisher. We are sorry for any problems this might have caused our overseas customers.
Matrix will be releasing the game for digital download Friday May 4th at 00:01 A.M. or easier said one minute passed midnight tonight. The Matrix / Tri Synergy release will be using our own serial number system and NOT the Starforce system. Remember this is a large download (1.8 gigs) so anyone downloading it may want to use a download optimizer / download manager. Matrix recommends the free version of StarDownloader. If you are not sure what StarDownloader does it explains it very well on the main page of the web site.
Our Game On Demand version will also be available for at the same time as the digital download version is available. Our Game On Demand version is our boxed product that is shipped from our warehouse and come in a DVD Case with full color sleeve, three CD's with full color labels and a printed manual. The Game On Demand should start shipping around May 18th. Remember if you order a Game On Demand you can download our digital version immediately at the time of your order and start playing right away as your box version wings its way towards you.
The North American retail release will be available around the week of May 21 at EB Games and GameStop stores. Check with Tri Synergy for information and other retailers."