Nice, I'm not sure either. Never played them myself. Only thing I remember is that it's suppose to be a training sim for assassins? So they put you into a sim to fight in the past or something?
The plot is that your assassin blood gives you a link to the past so you can relive the memories of your ancestors and see where ancient artifacts were hidden. Then when you go back to the present you can find those artifacts before the big evil corporation does. The first few were pretty fun, but at this point they're kinda like fast and the furious movies - when you've seen one, you've seen them all.
Transistorhttps://www.epicgames.com/store/en-US/product/transistor/homeEpics games store game though