Epos Amazing
This is such a great game and I've spent so many hours playing it! The boss battles are a blast, they were always challenging but rarely frustrating and really varied. I've gotten all the medals already and I'm still addicted! The only things that seemed lacking are the loot and maybe some other customization options like equipment, however I think the game is good enough without equipment because the balance is so good and varying equipment might throw it off or lessen the challenge, which in my opinion is the main thing that makes the game so addicting.
Knights of Rock