The sequel to Operation Flashpoint has managed to better the legend that we all know and love.
I'll start off with the graphics. They're not the best I've ever seen, but considering it uses a 5 year old engine I'd say they're pretty fantastic. There's also the fact that there isn't much attention to small details, but this is only a minor problem that I'm willing to live with. Overall, the graphics are great but could have been better.
Secondly, there's the gameplay, which I believe is even better than in Operation Flashpoint. The world is huge, and you can do pretty much anything you want. There is no loss of framerate even when there are hundreds of units on the screen at once. The battles and immersion are truly epic, and I really cannot think of a single fault. However, ArmA is more for realism buffs than the run-and-gun sort of gamers.
The sound is brilliant. As bullets whizz past you, you can hear the... well... whizz, as they go past you. The guns, vehicles and wildlife all sound realistic. You can hear helicopters as they fly by in the distance. If said helicopter flies behind a valley or large hill the sound will be muffled, and then become clear again as it re-emerges. Distant firefights sound excellent, almost as you would expect them to in reality. The only problem with the sound that I could find is a crackling noise that happens sometimes, however I solved this problem by turning off EAX and turning on hardware acceleration. Probably my hardware that was the problem anyway.
The game has a few small bugs that I have found. One that bugged my slightly was that if you look at the floor, while armed with your secondary weapon (so your primary weapon is on your back), and reload, then your primary weapon will move so it is above your head. It moves back into the right place once the reloading animation has finished, however. There are also a few other minor bugs that I won't bother going in to.
On the plus side, most of the major issues with Operation Flashpiont have been fixed, such as the clipping issues (being able to run through walls, for example) and retarded animations.
Overall this game is absolutely brilliant, aside from a few bugs which will most likely be fixed with patches in due time. It takes a bit of getting used to, even for an Operation Flashpoint veteran like myself. However, once you get past the learning curve it is a really enjoyable and immersive game.