Medals
Purple Heart: Get wounded or killed in action.
Bronze Star: Get 15 kills
Silver Star: Get 20 kills
Distinguished Service Cross: Get 25 kills
Congressional Medal Of Honor: Get 30 kills
All heroes
Successfully complete the first twelve missions in campaign mode to unlock all twelve heroes as playable characters in quick mission and campaign modes. They include Henry Ramirez, Nigel Tunney, Will Jacobs, Jack Stone, Guram Osadze, Susan Grey, Klaus Henkel, Buzz Gordon, Lindy Cohen, Astra Galinksy, Scott Ibrahim, and Dieter Munz.
If you complete the (X) objective for each mission, you will unlock a new soldier. These soldiers have boosted stats and have their own specialist weapons. If these soldiers die, you will not be able to use them except in quick mission mode. You can also use their weapons in multi-player mode.
Fever Claw: Sniping location
When playing in multi-player mode, find the large building with a Russian flag flying in front of it. Go through the gate and take a right, then a left, then another left, then turn around. There will be a stairway. Go up it into the building and go up those stairs. Take the first left and you will find a very nice sniping location.
Easy mission completion
Use the following trick to complete Missions without doing the objectives. Play the mission like firefight mode. Once you kill everybody, the mission is automatically complete with all objectives done.
Start a campaign by selecting "Unassign" to empty all team members. Choose only one man for one team (A or B) if you want an easier Medal of Honor, etc. You can keep a second team as a backup at the insertion point and on hold, suppress and in the prone position (if desired), if your one man is properly equipped with the correct weapons to meet all of the objectives. Before any shooting commences, enter the pause menu and choose "Quick Save". Then, seek and destroy all enemies using only this one man team. As soon as you eliminate an enemy or enemies, pause game play again and do another quick save before continuing your mission. If you should somehow get killed, do not select "Restart" during the mission. Instead, select "Reload" and continue from your last quick save.
On a mission that you are having trouble on, tell the other team to go to a point then follow them. This will help you find where you are supposed to go.
If you are stuck on a quick mission, try these teams. Team Alpha: any three rifleman; Team Bravo: Henry Ramirez (MP5SD, M9 SD), Nigel Tunney (SA80, M136), and Jack Stone (L96A1, M9 SD). First, put Team Bravo in a safe place and do not switch to them until all of Team Alpha gets killed. Try to get as far as you can with Team Alpha before they die, then switch to Team Bravo. You should be able to complete the mission this way.
Recommended weapon
In multi-player mode, choose a rifleman and get Kit 6 (MP5 SD, extra ammunition). This kit will almost win every battle because it has a 30 shot clip and you can walk while looking in the scope. You will have great accuracy with most of the shots. It really does not matter what gun your opponent chooses, unless they select the same kit. The M136 and other powerful weapons take a long time to aim.
Hidden weapon
In the multi-player level in the city, go to the second floor of the bank. Behind either of the doors, facing out of the window will be a 50. cal.
Determining enemy locations
When you have a difficult time seeing where your enemies are shooting at you from, send Team Bravo directly in front of you and look which way they are shooting. You will probably lose many men because of their bad aim, but can always restart the level after you know where they are located to easily take them down the second time.
Turn on your night vision to see all enemies within your line of sight.
During any day mission, if you cannot see your enemies turn on the night vision goggles. The opposition will appear as bright white against the lighter green shades of night vision.