Most Realistic Shooting Games

We're NOT talking about graphics. How real it is. Things like:
- bullet drop
- wind affecting shots
- 2-3 shot kill
- weapons jamming
- tactical play not Rambo
- team being work necessary
- getting hit in different body parts has different effects (like if in the leg you move slower)
- realistic feel of the game
- based on history

The Top Ten

1 Operation Flashpoint: Cold War Crisis