Gears 5 is a very fun shoot-em-up game, with lots of squishy alien baddies to vanquish, and all sorts of different sci-fi action in the process.
Unfortunately (for me), Gears 5 is really a multi-player tactical game, to be played online with your friends; the "campaign mode" is pretty much just a multi-hour tutorial on how the combat mechanics work.
There's an "open world" of sorts, but really it's not very open, it's just a pretty landscape that you can zoom around in while you stop off at various locations for various missions. Stories, background, NPCs, locations; Gears 5 doesn't bother with that, it's all about Vanquish The Baddies!!
Very fun, just not what I was looking for right now.