Ok so ill break it down by section:
Campaign: Ive always loved Halo's campaigns, but in every game the mulitplayer overshadows it. To me, not this time. Halo 4's campaign to me was amazing, I loved every bit of it. I didnt have any problems with it except for the fact is was only 7 hours (but thats average I guess) and a lackluster ending (which I'm sure will be solved with 5 and 6, so that part is kind of irrelevant). The story behind it was fantastic, and emotion was displayed like never before in Halo. I'm not gonna give any spoilers but for those who played it youll know what Im talking about. In the end, I give the campaign a 9.5/10
Multiplayer: Sucks. I might be one of the very few who thinks this but i hate the mulitplayer. I hate the fact that the maps are pretty tiny. I've always been a big team slayer guy, and it says a lot when Ragnarok is the biggest map, considering it was a medium sized map at best in Halo 3. What pisses me off though, is that is previous Halo's, there was like a 1-2 minute window from the start of the game to the point you actually started firing at your enemy, depending on the map you play on. Halo 4 youre put right into the action. And I know a lot of people like that, but its very frustrating to me. I do like the ordinance drops and have faith they can take it further in the next games, but at the same time i still wish they would have certain weapons spawn at specific points. I believe 343 can fix this in either DLC's or worse case, wait until 5 or 6. Theyre going in the right direction, but I personally believe they screwed up on multiplayer. I give it a 4.5/10.
Forge: I shouldnt have to say much as I havent found one good forum about forging. Its awful, and thats putting it nicely. Our creativity has been taken away by giving us 3 tiny maps to work with. I feel like they tried too hard to make the maps look good to realize that they didnt really give us much to work with. The good news is, this is probably the easiest problem for them to fix. App some maps the DLC or heck even come out with a new DLC specifically for forging. Me personally, I loved sandbox and forge world, but would also like to see either sandtrap, avalanche, or standoff recreated. Forging in Halo 4 gets a 3/10
I havent go a chance to play custom games or spartan ops yet with be being in school and what not. Ive heard spartan ops is amazing and I believe it. However, i have played "Flood", its good, but i would have much rather preferred they stick to regular infection.
In the end I give Halo 4 a 7/10. The campaign saved it and they have a lot of work to do. The good news is, this was just their first game. If 343 is anything like Bungie theyll love this criticism as theyll do anything they can to fix the problems in further games. As for me, Ill probably stick to Halo Reachs multiplayer and Halo 3 custom games for now...