Ok...I played for about 4 hours last night. At first I played some of the Single player. I was getting wasted left & right. The game is tough. Then I saw some of the guys on my Friends list were playing so I invited one guy over for some Co-Op. It got a little easier, but we still had to think and not just go in and shoot everything. You HAVE to use the cover feature. It's very intuitive and refreshing. There's parts of the Co-Op where you take one soldier with you and your friend takes another and you branch off in different directions. Very Cool.I then played some Multiplayer. HOLY SWEET MOTHER OF GOD. Thuis game is seriously going to take a bite of my free time. I could not put the controller down. I'm a teacher and I knew that I had to wake up at 5:30 today and I didn't shut off the 360 until 2:30 a.m. I'm hooked. The maps are small, but it's ok since the max you can play is 4 vs. 4. Some of you might want bigger numbers, but it plays perfectly like this. You are in the oppositions face with 10-15 seconds. The weapons are extremely varied. The Hammer of Dawn basically lets you "paint" an area and then a huge laser rains down from the sky. Total destruction. This is especially good for taking out snipers. Another favorite of mine was the madic rifle with the CHAINSAW built into it for use as a close combat weapon. One of my favorite moments was when I jumped over a couch, sawed the guy in half with blood flying everywhere. I then switched to my shotty and blasted a fool trying to come after me. I finshed him off with the curbstomp. This game is VERY, VERY VIOLENT. Do not play in front of young kids. Seriously. If you guys need to know anything else, just ask.This game seriously is worth the purchase of a 360. After only one day, I can truly say that hype is definitely worth it. Halo 3 has it work cut out for it. I rate the game a 9.8 out of 10.