Only buy if you like to crawl around a jungle a lot.
There are a couple of mission parts where you play a back up soldier and storm an Oil rig and a base but these a quite poorly done and just just don't have the feel of such games as the Battlefield or Bad Company series. The developers would have been better off sticking to sniper and spotter game-play. Now in one mission part you play the spotter for a sniper which worked well and was different. A bit more of this would have been nice.
The game does not have any skills development or a pre mission choice of kit. You can swap out a rifle in mission but that's pretty much it.
Stealth mode seemed to only partially work for me and I had to resort to taking out most of the enemy in quite a few missions which felt wrong.
Sniper ballistics are Ok but I found Sniper Elite better. On Hard you have to judge the elevation and wind offsets yourself on medium there is a little red circle which shows where the shot will land. Successful head shots give a nice slow motion cut scene which is good.
Good Points: Tense game-play late on. Head shot cam. Jungle graphics.
Bad Points: Very linear. Soldier missions. Lack of skill building, Lack of Weapon or Kit choice. Stealth mode just did'nt work well for me.