ARMA III was available as a demo at Gamescom Cologne.
The game, more noted these days as the basis behind the DayZ add on module, focuses on the year 2035. Iran invades a tiny Mediterranean island, and the players battle it out over the limited terrain. This author is not sure about either the premise of the game, or the limited locales. It is an intentional way to limit the map sizes, but would not an island like Bahrain, an island actually under Iranian threat, or another island like those off of Dubai be more logical for the fighting?
Hooked Gamers has more on their play of the demo and the background of the game at http://www.hookedgamers.com/pc/arma_iii/preview/article-1058.html