I do recommend to purchase this game but only when it is on big sale and I will explain why in details.
First of all, I have to be honest - I am SC fan and I was playing the series right from the first title. And yes, I do not care about graphics - more about overall atmosphere. Though I do care about how devs supporting their product.PROs:
The game has very good single player and if you play it right it feels like that old SC's that I loved so much - you can do the things silently or even without touching anyone (there are some counter-examples though). I have to mention "train break-in" and believe me you won't be happy with this situation if you are fully stealth player. Overall, single player is a good way to entertain yourself for another day or two but that's all. If you are the "loud guy" you can also re-play everything as panther or assault. The only question remains is why those awesome night infiltrations have gone? You encounter only several in this installment.
CO-OP. Well, it took the best features of SC Conviction co-op and executed them just perfectly - it is another great game to play with a good friend of yours for some time. The only thing I don't love is that it is way too short (I am also extremely dissapointed with that Briggs' missions never-ending bug, but let's keep it aside as it might get fixed). It's an outstanding co-op if you play it right - you have all the tools you need but if you fail to deliver you are the only one to blame.
However, the thing I was so excited about is SvM (Spies vs Mercs). This was initially introduced in Pandora Tomorrow and in next installment, Chaos Theory, it keep many gamers entertained for years. Double Agent also presented us with SvM but it was not so popular. With no SvM in Conviction I though that the series is getting worse (like many others on the market, sadly) but SvM got its place back in Blacklist. It is so much fun that you can play it for hours and hours, again and again. It is almost perfectly balanced, and, aside for some bugs, you can equally good play as a merc and spy and there is no loosy side really. You might think that one side is better than the other one at first, but as soon as you start to use your equipment properly and your skill increases - you will see that SvM is balanced nicely. I was in worldwide top 15 at the moment of writing so I do know what I am talking about. What about modes - I was so hooked by SvM Blacklist that I abolished that SvM Classic mode, which many claim not to be classic (and I agree with them). They re-introduced Deathmatch as well, which still looks weird for me, even though my beloved Chaos Theory also had one. For newcomers I recommend to try out SvM Blacklist and SvM Extraction.
Points are - if you are looking for Chaos Theory Redefined - Blacklist is a good choice as it is Chaos Theory ideas blended with some Conviction mechanics. If you are looking for exact copy of Chaos Theory or Pandora Tomorrow - you better look for an unsold copy of CT or PT at your local store - Blacklist has different focus - it is more action-driven than Chaos Theory (single-player and co-op) and more diverse in terms of SvM. Yet it has many bugs in each of the modes of game so you have to live with it. However, as I have been playing CT for years I glad I now have something else to play.CONs:
Major technical issues - Ubisoft failed everywhere it can. Let's start:
General. You have reinstalled your game? Congratulations, your saves, DLCs and friends on the list are now messed up. Everybody complains about it since the release and nothing was done here. You have high-end PC? Well, that's good for you but still you will witness FPS drops, launch failures and whatever the game can possibly present you with. Even on Official Gameplay reveal day the game crashed. ANd again, Ubisoft fails to make it work.
Single-player. There are moments when you are forced to use your weapons or whatever you don't want to as a ghost. Many missions are just not from Splinter Cell world and you have to deal with it. Ending? Well, you have to wait for someone to think of something else. After some patches Sam are likely to bash all doors he can see. Definitely an improvement.
Co-op. Short. And by this I mean extremely short. Random picture distortions, FPS drops in some locations. You can spend 2 hours passing the last Briggs' mission in ghost style just to face the never-ending bug. And what Ubisoft has done about it? They say, start over. That's all. Additionaly, you might be unable to play with your friend - you can play with randoms but not with your beloved friend who also bought this game.
Multiplayer (SvM). Ubisoft completely failed technical part here. You can see half of animation of you killing a person and then you drop dead and that person is near death. You can see Merc's reloading animation yet he completes reloading in the middle of animation and shoots you. Many complaints - nothing was done here. You will kill (and be killed) your enemies while they are already behind cover just because you started shooting early. You can sometimes see spies through cover when they stick to it. Some pieces of spy gear (takedown gloves) has absolutely no real effect - even support cannot say what it does exactly. And there are many, many more issues in SvM. Oh, one more thing..Cheating? It is allowed so you can't really distinct between really good players and cheaters unless their cheating effect is obvious.
Overall, 7.0/10. If not some major issues - the game might be perfect one. Though Ubisoft managed to fail another good title.