havent played FC2, but can say that the original Far Cry had amazing graphics for its time, but the gameplay (IMO) was very repetitive and got boring after a couple missions. nothing new or special in that department.
they made it too easy to find enemies, as you can hide in the bushes and have your scope find the enemies for you, without even being able to see them (it highlights them with a target)
so it was basically: find a place they cant see you, use your binoculars or scope to see every enemy within range and pick them off before you ever get in any real danger. its almost like cheating. the game offered no challenges, was just an easy slaughter. i never finished it, because i got bored with it.
theres gotta be a demo out there, if youre considering buying this game. if youre going to pirate it, then theres really no point in this discussion.
dammit, i just searched, and apparently there was no demo released for far cry 2. maybe you should look at the youtube footage of it and see if its something you might enjoy. you probably need higher end graphics capability to get anything spectacular out of the graphics department. thats something to consider if you dont have a hgih end gaming machine.