Stealth is an integral part of many a first-person shooter, but in Sniper: Ghost Warrior it's the entire deal. Ignore the backstory (tossed off and naive, plus you're not even a ghost) and the deplorable voice-acting (like members of the Republican party getting in a lather) and what's left is a game where the majority of your time is spent moving very slowly, sometimes face-down in the dirt and often dressed as a bush.

S:GW is concerned on a deep level with that über-Freudian preoccupation of Sticking It In, From A Distance. There's some sneaking/knifing to be done, and a pistol for the real extroverts, but most killing is via the sniper's rifle. If crawling tentatively through garishly lit jungle isn't exciting enough, just wait until you begin factoring wind speed and direction, as well mastering control of your breathing (oh yes) when attempting to blow someone's head off from hundreds of metres away. Ultimately, it's the quieter moments of Doom, Half Life and the rest, without the interesting bits in between.