Insurgency: Sandstorm free Open Beta weekend has started! Starting today and running through the weekend, an open beta period will invite everyone to try the game for free on Steam. This includes every map, weapon, coop & PvP game mode and all other content found in the final game. Competitive matchmaking will be available on full release. The game is now playable totally for free to everyone on PC for this limited period between 8am PST today through 9am PST Monday.