I and a few others within the 29th have discovered a free game on steam called Foxhole. It is a top down 3rd person multiplayer shooter with an open world.
The gameplay involves supplying your troops, building fortifications, attacking enemy held cities while defending your own, and using communication with other people/squads to achieve your goals.
The game is in pre-alpha so their may be minor glitches and many gameplay features are being worked on.
The game is on steam and is only around 500mb- 1gb to download.