The best local co-op game in my opinion. If you're looking for non-stop fun killing your friends and taking your throne as the ultimate friend, well this game is for you. Definitely worth the money you paid for this game.
You can play with someone using only mouse and keyboard. Other than that is through the use of controllers.
While you wait for your challengers, you can train against the bots and they are deemed quite powerful in the normal difficulty, how much more in the hard difficulty which is no mercy.
There are also deity challenges that really measures your capability against others. One of it is the Glub where you only stick to one monster type and weapon in which you cannot evolve nor change weapons. Are you up for the challenge?
I am keen and supportive to the development of the game because I am a huge fan of this game and to the team behind it. Updates take a while because it is only made by two people behind it but when they release it, it comes with a bang.