Is it possible to calculate the path?

Hello! Doing step by step RPG. Is it possible to calculate the path using only 90 degree angles? My game does not have a grid, I just need my opponents to figure out the path as if there is a grid in the game. To make it clearer I will attach a picture.

P.S. I've already done the methods for moving around the cells. I need only the enemy to understand when he needs to turn, or go.

P.S.S. If I use NavMeshAgent.SetDestination (target.transform.position), it will build the most direct path diagonally, but this option does not suit me.

 

Yeah that's not possible with the default NavMesh system in Unity. Look into A* pathfinding, that's how tilebased games deal with navigation (and what Unity's system builds on top of, unfortunately with too much stuff over it to use for this kind of stuff).