styx looks like a poor-mans Shadow of Mordor with an Orc in charge?
It's a proper stealth game. A mix of Thief and Hitman, and you can't simply fight anyone. On the easy difficulties you can at best only parry at timed moments, and try to do a kill strike after 3 parries. Even then Knights, Orcs, and Elves all one hit kill you, with elves able to smell you. Even when you're invisible.
Stealth is key, and killing only a last resort from the shadows, or as an objective.