JohnnyK
Hardcore
http://www.rockpapershotgun.com/2013/02/26/rifle-report-arma-3-enters-playable-alpha-on-march-5th/
EDIT: http://www.bistudio.com/english/home/news/projects/358-plans-for-arma-3-in-2013Pre-ordering a “supporter edition” will soon give immediate access to Arma 3 on Steam, or at least to an alpha test of a limited build of the game that will run until the full beta test some time in the second quarter of the year.
Emphasis mine.To participate in the Alpha, people can purchase the Arma 3 Alpha (24.99 EUR/19.99 GBP/32.99 USD) or Arma 3 Digital Deluxe Edition (39.99 EUR/34.99 GBP/49.99 USD) on Steam. Extras in the Digital Deluxe Edition include a digital soundtrack*, digital maps*, digital tactical guide*, and a Steam Gift of Arma: Cold War Assault (formerly known as Operation Flashpoint™: Cold War Crisis). Both versions include access to the Arma 3 Beta plus a digital copy of the complete game upon release. The price of each edition will increase once the Arma 3 Beta and final game become available.