Source Steam Blog store.steampowered.com
Like clockwork, Steam's Free Weekend promotion is back, this time with a couple of games for players to check out (including a single-player simulator and multiplayer military shooter), and those games will be available from now until September 28 at 10 am PT/1 pm ET. Newcomers should know how Steam's Free Weekend promotion works: essentially, players get complete access to a game for a limited time, as it becomes a…