Ghost Recon: Heroes Unleashed, the ruthlessly unforgiving tactical shooter experience. True hardcore realism, with nonlinear play, real-world physics, and ultra smart AI. Infinite replayability, with tons of worldwide maps, missions, game types, international special forces units, and a massive arsenal of authentic weapons and equipment.
It's "just" the best mod if you want to play this masterpiece of a game.
I can't play without it anymore, feels weird like that.