Aspiring terrorist hunters, assemble! Have this year’s Halloween preparations left you without enough pennies to continue with your terrorist hunter training? Well, I bring you good news, for thanks to the wonders of Steam’s free weekends, Valve’s latest game – Counter-Strike: Global Offensive, released little over two months ago, is now free to play for the entirety of this coming weekend, until Sunday at precisely 1 PM PST (roughly 9 PM GMT).