Ive completed this game 2 days ago and loved every moment, the levels, bosses, cutscences.
very similar to the metal gear solid universe, (cool mad bosses, good story, great graphics and subtle humour)
However its not a all sneaking but cutting everything up!, its very smart it has different combos.
It is very challeneging but very rewarding once you complete a level or a boss fight. Some boss fights can take you more than 20 attemps, but you will defeat them at the end.
I recommend this game to anyone who calls themselves hardcore gamers and want a challenge.