Well, like the other reviewer, I have played the German version with English languages.
I'm not much of a Reviewer but I'm incredibly compelled to review this game since it is purely magnificent. I have played the first ArmA and though the graphics were cheesy and the game was buggy, I still thoroughly enjoyed the gameplay. ArmA 2 has taken the recipe of ArmA and brought it towards the standard of modern games. There is a huge graphical improvement as well as a huge gameplay improvement. The whole `Army Simulation' promise has been well delivered.
The gameplay has a more realistic feel and takes a while to get used to. For example, when you move the camera, there is a motion blur giving the camera a more human feel. When you sprint, your head moves in a realistic fashion and the sound of breathing seems the get denser the further you run, so even the elements of moving are immersive. Although these aren't anything major, it adds a great experience to the game.
The AI is a great improvement too, they react according to various things such as realistic sight and hearing. Whereas in ArmA 1, there was a few instances where the AI would spot you in a hill a kilometre away while you are wearing camouflage mesh after you farted. Although the AI is a great improvement in terms of what they react to there is still a few issues. During the first mission in ArmA 2, I spent around 30 seconds looking at a guy right next to me because I thought he was my pal for not shooting me. Then, as you most likely guessed, he turned around and shot me in the face. With that said, I think that may of been my fault since I was hidden in grass right next to him.
The sounds have also been upgraded from ArmA 1, the shooting sounds a lot more real. Thats all I can really say about the sounds. Oh, the radio talking still sounds odd, with each word being spoken in a different tone of voice, but that may be because of the English pack. And to be fair, if every radio message was spoken separately, it would include something such as 300,000+ audio files since there would be a vast number of combinations.
There has been alot of interactivity added to ArmA 2, you can enter a few buildings and you can speak to the locals, asking them how the weather is, where you are and if they had seen anyone. This is helpful if you're patrolling an area and want to see if its safe before you enter. I would list a few more of the exciting features but that's for you to find out for yourself.
The controls are like the standard FPS (W, walk. A, go left, ect.) with a few extras such as the compass and watch. The only complaint I have is that the controls for helicopters and aeroplanes are insanely difficult to get used. It's not a simple case of `W' being up, `S' being down and moving with the mouse. The controls are along the lines of `Q', Add thrust. `Z' decrease thrust'. `W', nose down. `D', nose up. `X' tilt. It's incredibly complicated but it'll appeal to those who enjoy flight simulators.
I'll now move onto the campaign. The characters are more established than they were in the first ArmA, they're more a part of the game, this is a little difficult to explain. Characters in the first ArmA just seemed like generic soldiers without any real characteristics. ArmA 2 is the opposite of that and there is also more interaction within the campaign, such as optional objectives, the way you carry out objectives, ect. You have more of a choice of what happens. Being honest, this is the only non-RPG which I've seen give such choices. I haven't really got far into the campaign since I've been having a blast with the built in editor which allows you to make your own campaigns with ease.
I know I have spoken highly about ArmA 2 but it truly is an enjoyable game for those who like combat games/war simulators. The game does have its off moments but they don't affect the gameplay and are barely noticeable.
I really recommend this game and if you get it, I hope you enjoy it.