Okay, this game shouldn't even be rated M. A common comparison is Halo and Call of Duty. They are NOTHING alike. Compare Call of Duty to Full Metal Jacket, and Halo to Star Wars. Halo is not that bad. Blood is unrealistic, and is very minimal. The only time blood is red is when you are killed, or you kill another player in online mode. It's really just a few drop that fly from the body. There will be blood splatters on the ground, but there's no amputation or anything gory at all. If you play the campaign, it's just alien enemies, with blue or purple or black blood. The worst part of the game is a slow motion sequence of an explosion in a lab, with a close up on one of the more important scientist characters. There is no blood, but her skin is burned off (unrealistically) revealing pink muscle tissue, an then stark white bone. The character had no development, so it wasn't a very sad death, but it was a little intense, and could be scary for younger players. What is with everyone talking about how scantily clad Cortana is? There is NOTHING inappropriate about her, and she is one of the greatest characters in the game. Language never goes above "d*mn" and is never used without good reason. Master Chief a strong role model, with others in mind. He thinks more about the people back on Earth and his fellow marines than himself. This game is also very strategic, and unlike most first person shooters, you can't just blow everyone to shreds. You need to keep ammo in mind, along with Health and the safety of you marine companions. You will die a lot in this game, and it can be very frustrating, but the feeling of achievement when you hit the next checkpoint makes up for it all. This game really really requires you to think. Also, it's very story driven, so it's almost like an interactive movie. This game is a must for everyone who loves video games.