Insurgency: Sandstorm is currently completely unlocked for free on Steam, for everyone to try it and play it until next Wednesday, April 1. It is also on a 50% discount, so if it happens that you like the game and want to continue playing it after the promo period, you can buy it for a significantly lower price.
The game is a squad-based shooter, with the focus on realism, just like its predecessor from 2014, Insurgency. One of the most innovating things about the game is position-based team chat, where you hear your teammates based on a position where they are at the game.
"Experience the intensity of modern combat where skill is rewarded, and teamwork wins the fight. Prepare for a hardcore depiction of combat with deadly ballistics, light attack vehicles, destructive artillery, and HDR audio putting the fear back into the genre," the description says.
The game is constantly being updated with new weapons, vehicles and balance patches, to keep things fresh.