Three things. 1: Sound design. 2: Physical Object Projectile system. Take away these two things and it's just another shooter with good graphics. The weapons in this game feel and sound so real. You actually feel like you are hitting your target. That feeling when you hear a bullet wiz by your head illustrates these two systems working together. 3. Player freedom. Take any path, choose any loadout, and play the game You want to play it. Hell, I've gone into Bounty Hunt with just a knife before and walked away with a Mosin and then the Bounty. I'll always remember that match. The only thing you're really forced to do in Bounty Hunt is leave after the contracts expire. Everything else is player choice.