Welp, played quite a bit, here is a review.
Campaign:
The Campaign had a bit of a slow beginning but gradually picked up throughout. It has many allusions to the previous Black Ops and ties in a lot of the 'loose ends.' The most unique thing about this Call of Duty's campaign was the alternative endings. Which means, you can choose what you want to do, such as, 'Kill or Spare?' Because of these different decisions, the choice influences the end of the game and can end in many different ways. Some are really twisted, some less twisted. So lets build up the storyline, you're playing in two era's of time; 2025, the future and 1986, in the past. In the past you play mainly as 'Alex Mason' whom you played as in Black Ops I. In both parts, future and past, they both have the same objective in mind. To kill their enemy 'Raul Menendez' a Nicaraguan political activist who is the main antagonist in the game. I wont spoil anything - but by basic common sense, if the 2025 group were after him, he obviously didn't die in 1986. As time moves on, he becomes a more dangerous threat, David Mason, Alex Masons' son, tries to do what his father couldn't. He is joined with the other Navy Seals, Harper and Salazar, to undergo this task. It is interesting to go back and forth from this futuristic time period to the past and play with characters such as Woods and Alex Mason again. This campaign holds a sentimental value to it and a aggressive emotion to it, which makes it unique. I highly recommend you play it.
Campaign Rating: 9/10
Zombies:
I'm not going to lie to you, I did not play much zombies at all, but Tranzit was a blast, (I love riding the bus). It gave it more of a zombie feeling and I loved how you had so much more accessibility to the maps, there ability to go so many more places. The zombies are more gory and deadly looking. But I'm not going to lie, survival in zombies is all very similar to all the other ones. The Tranzit was nicely added and I'm glad they did that instead of just another survival mode that has been overplayed. They also added a team mode in which there is separate teams that can either work together or against one another, catch is, there is only one surviving group. I haven't played much to make a definitive decision but overall so far, it's been fun and exciting.
Zombie Rating: 9/10
Multiplayer:
What we all (or most) of us bought the game for. I personally enjoy the multiplayer, but to an extent. It can, well there is no way to put this politely, piss me off. Some guns, I feel can be a tad 'underpowered' which is surprising to here in a CoD shooter. I also dislike the leaderboard system how it is score per minute, it doesn't have the competitive edge that Modern Warfare had with its leaderboards. (I actually brought myself up to top 100 in FFA, I was planning to do this in Black Ops II but obviously because of this, I couldn't.) Apart from the negatives or downsides to the multiplayer there is many positive aspects. First and foremost, the snipers are bumped up in power and very balanced according whether its semi automatic or bolt action. I'm one whom hates hitmarkers with snipers with a passion. Most of the guns, besides from a select few, are very balanced according to Assault/SMG/LMG. The maps are okay, nothing to spectacular, but definitely not terrible. Some of the spawning on the maps is glitched badly. The audio in the maps is marvelous though, the sound of this game is incredible. Another very positive aspect is the lag, I haven't got any since playing - host migration isn't a problem either too, it works like a charm. The scorestreak system or as you probably remember it, killstreaks, have changed. It is much more challenging to get a scorestreak going, depending on which way you look at it, can be a positive or a negative. They brought back theater, which is nice, and CodTV which is probably some sort of sharing center, I haven't tried it yet though. The gameplay overall is pretty nicely balanced in health, regeneration, and gametypes. They added a few new games modes which is fun for some diversity, instead of playing Team Deathmatch all day. There is also a new type of mode call League Play, which I believe is where you get a team and do more competitive based matches. Good ole' Combat Training was brought back thankfully, which is always fun to do when bored. Custom games, such as Gun game and one in the chamber are back, which is a neat custom game to do. Elite is back, which was in MW3, I never really got into it though. Overall, multiplayer isn't half bad, it isn't just another Call of Duty, there are a bunch of new features that I didn't even list here, I think this will bring some love back in to what CoD used to be instead of that boring MW3 shit. These obviously, are some personal opinions on the game and maybe some bias included, but just a brief little review of the game.
Multiplayer rating: 8/10
Overall Rating: 8.5/10
Don't mind my grammatical errors, it's 3:20am and I didn't re read it because I'm too lazy.