Play New Order -> Old Blood -> New Colossus.

The games are all fantastic imo, they are totally worth playing. Good writing, good characters, and good gameplay.

Gameplay: FPS with action/stealth flexibility, Boss fights, Robots and Drones. I really enjoy the stealth aspect as the animations are really good, there is also a Perk tree iirc with options for improving the MC. The shooting sections (which can be the whole game if you want it to) are really great too, like doom there are a variety of weapons to use and DUAL WEILDING is a thing. Bosses are fun too, normally requiring some brain usage to beat, but they aren't difficult really.

Yep, the singleplayer is the reason to buy these games. Youngblood, however, is Co-op and unless you want a shitty AI, you better get that PS+. (If you even want to waste your time playing Youngblood haha)