Wear good shoes...your going to be walking...a lot.
Other than than, it's not bad. There are South African Mercenaries, and factions are trying to eliminate each other with civilians caught in the middle, with a CIA minded boss character named the "Jackal".
Finding his recordings and listening to them gave the feeling of Colonel Kurtz in "Apocalypse Now". You do get to have a few partners throughout the game, who will help you out when the going gets nasty. There are upgrades to the weapons, and skills for them to match. But you have to earn them by finding diamonds, and doing lots of dirty work for undesirable individuals.
I spent way too much time walking and finding medicine for a disease I had. Driving from mission to mission was redundant. There is a bus service, but sometimes it does not help much.
It definitely has the Far Cry theme going but, I'd say the older version on the original X-Box was more fun.