I'm currently halfway the bridge mission, so I may suggest things that are indeed in the game but just in missions I've don't played yet. That said, here's my take:
-GRAPHICS: Outdated, but still VERY good. This game truly shows what good design can do. I was VERY surprised to see that my crappy ATI Radeon 9800 PRO was able to run a game published in 2007 with every graphic option set to high. Very well done. I'll give it a 7/10
-SOUND: Correct, but soldiers are too silent. More chatter would be great, and made them look more alive. 6/10.
-GAMEPLAY: Just what I expected, and then a bit more
Great level design. Good enemy AI. Some glitches prevent this from going higher (see comments below) 8/10
-OVERALL: 8/10
Now, my personal comments. Please note that I'm so far finding the game a bit too easy in the hardest difficulty level, and that some of my comments would raise the difficulty (other will lower it). Some comments are just nit-picking and don't have any impact at all, it's just that I'd find them cool
-It's a bit stupid that you can't stun a soldier if you're not behind.
-Soldiers should hear if a guy just 1 meter away from them gets downed.
-Carrying a long arm when dressed up as officer should raise suspicion (carrying a Thomson while dressed up as Colonel in Los Alamos felt quite cheesy
).
-When dressed up as officer you should get another pistol slot. You're supposed to be carrying a Luger openly and your silenced one concealed.
-It's VERY ANNOYING that you have to be directly behind a guy to choke/cut his throat. It should be easier. Like now it feels like you must be at 180º from where the guy is looking. There should be a wider "window" of a about 20º-30º IMHO
-Even silenced guns make noise. Silenced guns should make at least the same noise as opening a door. Probably even a bit more.
-It should be easier to open/close doors.
-Knife should not be 1hit-kill no matter where you hit the guy (should force you to aim it). It feels goofy to kill a guy by knifing him in the ass
-Some mission should force you to shoot your way out. There are tons of different guns and so far I've never shoot a non-silenced weapon.
-Some mission should force you to shoot your way in
I find a pity that you have designed so many good looking soviet guns that don't see any action during the game.
Great game! I'd love to see an expansion/sequel.