I found out about this mod today, and it seems it has a very large fanbase and a new major update was released today. And from watching some videos, it looks really amazing. I would suggest anyone who hasn't heard of it to go check it out. 
 
I've always been a fan of realistic shooters, and LOVED the Insurgency Source Mod, but this looks even more terrific. Anyone here play this? I think I'm going to buy Battlefield 2 just for this. Hopefully I'll find some GB users who play, or will play after watching these sweet videos :P
  
A great video demonstrating the teamwork: 
  

The voice acting in the first video is a total joke. Part of me wants to download this just so I can make spoof videos out of it. Which I probably will.
However as a big fan of modding I'll definitely keep keep my eyes on the updates. It looks promising. 
 
Oh, and you just reminded me that I need to put Insurgency on my laptop. Love that game.

I've been playing PR for nearly a year now, and it's great fun. Definately worth checking out.
 
@EgoCheck616: That wasn't voice acting. It was just people playing the game.

Awesome post.I almost forgot about Project Reality.Though it would be cool to see them break out of the modding community and make a full retail game some day.Kind of like Red Orchestra.

played it before its really good. BIG MAPS!!!!