This is a very very good game. But some of the gameplay mechanics are so frustrating. You have to have silent weapons with you at all times, otherwise, the enemies will notice you and they will eff you up, no matter what the difficulty level is. If it's on easy, then you get banged, if it's on medium, then you get DPed and if it's on hard, you get spit-roasted. There's no two ways about it. If you have to have any success with this game, then you have to go back to the Ark, purchase your medkits and stuff, keep yourself armed to the teeth and replenish your supplies and come back. But the Ark is so goddamn far... I ain't got time for that!!! But apart from that, great world, great characters and a wonderful game if you are not opposed to being patient and grinding out some of the levels.