A game with stunning gameplay, freedom and a brilliant storyline. You are talking about Farcry. An absolute thrill ride.
With a large collection of weapons and tactics available to eliminate your enemies, you could replay again and again just trying different things to try the outcomes.
The AI of the enemies is amazing and the use of veichles is magnificently utilized. Different levels force you to use different stratagies. Eg, the level named 'River". In this level you had to hook a PDA device to a radio outpost at the other end of a river. The river is a large stretch with mercs and other obstacles scattered along the banks. Whilst you became used to using your high tech binoculars to pic out and snipe, you becam a target flying down over brown water at full speed, dodgin bullets.
IF you ever get the oppurtunity to play, keep playing and get engrossed in the incredible masterpiece.