In Minecraft fashion, Bohemia Interactive has sketched out their plan for Arma 3 during 2013 and it involves the ability purchase the game early at a low price and gaining access to each version of the game as it's released. Starting March 5, pick up Arma 3 for only $33 and gain instant access to the game's alpha. Or, wait another week and try out the free Arma 3 Alpha Lite for no cost (invite only). It's Bohemia's way of showing their confidence in their game (and perhaps also their lack of funding).
In addition to the $33 basic purchase, Bohemia is also making available Digital Deluxe and Supporter versions of the game, $50 and $92 respectively. Both include larger amounts of goodies and DLC that should make it worth the investment for Arma fans. Read up on the bonuses over on Bohemia's development blog. Of course, all editions include access to the alpha and every versions of the game released thereafter.
The full Arma 3 game is planned for release in Q3 2013, with the beta beginning in Q2. The alpha version of the game will feature a limited amount of playable content along with some sandbox replayability. It's a good day to be an Arma fan -- tune in for more information when the alpha officially launches on March 5.