It didn't get the attention that other games got at E3, but it needs to be said Ghost Recon Wildlands looks like it'll be the sleeper hit of 2017. Essentially it looks like you're playing Metal Gear Solid V's single player in cooperative mode, which sounds awesome. Unlike MGSV though, it looks like the vehicles handle a bit better which will be a big plus for handling this sandbox world.
The game could use some polishing graphic wise, but overall I'm excited to see this one when it releases in March 2017. Check out some gameplay you may have missed from E3 below.