Squad Free Weekend

A free weekend is now underway on Steam for Squad, a tactical, military first-person shooter that's currently working its way through Early Access (thanks IgWannA). This provides the chance to check out a new Alpha 17 patch that just went live, adding a commander role, among other things. You can read the patch notes in this post which is accompanied by a video showing off what's new. Here's word on the game:
Squad is a large scale combined arms multiplayer first-person shooter emphasizing combat realism through communication, team play, emphasizing strong squad cohesion mechanics as well as larger-scale coordination, tactics, and planning.

It features large open maps, vehicle-based combined arms gameplay, and player-constructed bases to create a heart-thumping, visceral gaming experience with split-second decision-making in real-world scale firefights.