The combat system in this game reminds me of Batman: Arkham Asylum, which is a great thing. Along with that, the climbing mechanics and exploration are similar to the Assassin's Creed titles. Now, what makes Shadow of Mordor stands out, is it's well developed “Nemesis System”. If the player is defeated by an enemy, that same enemy will climb up in the ranks in his army, which will make him become more powerful. The more powerful that enemy gets, he will eventually becoming a war chief. This game make you feel bad for getting defeated by your enemies.
I completed the game already, clocked in over 25 hours of playing, and I’m still playing it at the moment (tons of side missions to do). I highly recommended this game to anyone who owns a PS4, Xbox One, or a gaming PC. From what I’ve read, the PS3 and Xbox 360 version of this game will not have the “Nemesis System”. This is unfortunate because, this AI system makes the game 20 times better.