This game is a blast! I can't understand why so many people reviewed this game badly based on assumptions and only playing the demo. It's a shame that ignorance can lead to a game to never take off despite having good game dynamics. I feel bad for those that will pass on the opportunity to enjoy a good game based on reviewers not taking their job/hobby seriously.
The campaign was a lot of fun. The game has a very interesting story that I won't spoil for you. Voice acting was well done and the overall tone of the acting fit in well with the game environment. People may say that it is a copycat game because it incorporates a functional cover system. Yet, no one ever speaks ill of games who's cover system never worked to begin with, like Killzone 2, which attempted the same exact thing, yet failed. Another positive is the unique use of environment. I really enjoyed an atypical approach to a battlefield. It was fun and challenging to traverse terrain that changes and moves during combat.
The multiplayer aspect of this game is the real gem. Progressing throughout the single player campaign, unlocking trophies and discovering secrets unlocks multiplayer characters that you can battle with. Each weapon selection has it's own ups and downs and all are effective to use. There are no perks, or powerups or weapon attachments, but did Battlefront need any to be a spectacular game? Teamwork is a must in multiplayer. That's where the addictive aspect of the game rings true. Developing tactics, helping friends up who have almost died and just hunting down the enemy in groups of four is great fun.
Positives aside, there are a few problems with the game. Multiplayer lacks the ability to form teams; players are randomly selected to form each team. There are no dedicated servers, so it's quite possible to run into players that lag a great deal. I personally don't like games that have powerful weapons scattered throughout the level like Uncharted 2, but that's my personal preference. In fact, multiplayer in Quantum Theory has a similar feel to Uncharted 2's multiplayer. Another issue is the lack of people playing. It does take a while to get a multiplayer game started, just because the community is still small.
I have a theory as to why reviewers bash the game. I suspect Americans do not like difficult games. I won't lie, this game can be quite a challenge from time to time. Some people take failure as a personal insult instead of approaching the problem from a new angle. This is something I appreciate about the game; making me stop and think instead of grinding forward. It's like an adventure game in that aspect, but without the old, tired, movable boxes thing. With that in mind the game is really not that difficult on Hard. World at War was much more difficult and annoying on hard than Quantum Theory.
I hope people give it a fair shot. This game really deserves some positive attention.