March is going to be a busy month with co-op releases. One of the bigger games to arrive next month is Tom Clancy's Ghost Recon Wildlands, and Ubisoft has beaten us to the punch with providing a "Co-Op 101" that covers what to expect from the co-op side of things in this open-world FPS.
The good news is that it sounds like they're letting the title be really open as far as playing with friends goes. If your friend is further along in the story missions than you, he/she can join you to help you complete those missions, or you can always jump ahead in the story and help them out. Of course, with all that hopping back and forth, you may be worried about progression, no worries there. "Whatever progression you make with your friends will be saved in your own progression." Finally, there's no "tether" that forces you and your buddies to stay within the same area, though they do recommend staying somewhat close together so you can revive each other should the worst occur.
While the UbiBlog team has their own "co-op hijinks" video, we prefer watching Eric and the F.A.L.C.O. crew try out their own tactics.
Tom Clancy's Ghost Recon Wildlands launches on March 7 on the PC, Xbox One, and PlayStation 4. Four player online co-op is supported throughout the game.