This page on the ARMA II Website outlines preorder options for ARMA 2: Operation Arrowhead, the now gold standalone expansion for Bohemia Interactive's military shooter sequel. Preorders are also underway for ARMA 2 - Combined Operations, which bundles the new expansion with the original game. For some reason the preorder pages list a June 24 release date, rather than the just-announced June 29 date. Thanks KaBoNG.