This game is incredible! The world reacts to your decisions in a very realistic (and D&D-esc) way, meaning that even the smallest action can have consequences. The tag system in dialogue also makes the world come alive; NPCs react differently to different characters and so forth. Lastly, the story will leave you questioning which side is the "good one," and if there really is a good side at all. Due to all of this, the game is very replay-able, with or without friends.
Fair warning: Combat can be very difficult in the beginning, even on Classic (normal) mode. However, it gets easier as you learn different tactics and level up, and is overall a solid part of the game. 11/10