Do not overuse the aim, meaning do not walk around aiming your gun everywhere. The problem becomes blatant when you walk into an open space and need to examine your surroundings quickly, so as not to get shot. Your aim speed is very slow. Instead, use the camera to look around quickly. Also, the direction in which you point your camera is where your character will aim his weapon when you press [Aim]. This is much faster than manually aiming. Finally, do not spray and pray.
Boasting salute
After acquiring the instructor skill, enable it then do a salute. Your salute changes to a boasting type, where your character puts his or her hands on their hips and pushes their chest out.
Character selection screensaver
Remain idle at the character selections screen. Your character will hide in a box or start reading a magazine.
Dizzy character
Keep spinning your character in circles at the selection screen. When you stop, he will get dizzy and fall over.
Easy sniping
Never stay scoped for too long. If you do, you will not be able to see your surroundings; if an enemy sneaks up on you, they will kill you in the most humiliating way he or she can think of.
Always keep claymores and magazines to alert you of the presence of an enemy that is trying to sneak up behind you. With magazines it is slightly more difficult, but it should be the primary choice only because while the enemy is occupied looking at the magazine you can easily get a headshot. Claymores will just knock them back, then they will get up and kill you.
When you kill an enemy from one vantage point, switch to another. Most of the time when you kill an enemy they will know where you shot them from, then they will sneak up behind you and kill you with ease. For example, at G.G. if you kill someone from the tower, get off the tower and run to the roof. By doing this they will not know where you are.
Never use the catapult. It is a sniper's worst nightmare when an enemy knows where you are. Almost every time you use the catapult, the enemy will know where you are going. They will then sneak up behind you and kill you.
Use tranquilizers instead of handguns. The Mozin-Nagant is not recommended. Use the Mk.II tranquillizer instead. If an enemy gets close to you, shoot them in the head with the Mk. II then zoom in with your scope (for about 400% more experience points) and get a headshot.
For easy headshots, shoot slightly ahead of the enemy. By doing this, the enemy will just run into the bullet. Make sure not to miss or you will alert the enemy to your presence.
Flying corpse
Place one of your own claymores. Roll into it, then once you have stopped moving have your friend shoot you in the head. If done correctly your corpse should go flying and look incredibly funny.
Flying salute
Get on a catapult. When you press Triangle to launch, do not release it while in the air. Your character will do a flying salute.
Hold 2 Rifles and/or 2 Pistols
When you start a round. run to a quiet spot. and dump your weapons. ( HOLD R2 and press O )
Run back to the starting point and pick out 2 more guns ( should take 30 seconds before doing it )
Run back to where you dumped your guns and pick them up.
Congrats you can know carry an assault rifle and a sniper rifle also a Operator and the Tranq gun.
You can also do this with grenades, also pick carefully the guns you picked first wont have as much ammo. 10 for SVD and Mosin nagant and 30 for M4 and Ak.
Ranks
Online ranks that show next to your name
Unlockable - How to Unlock
Bear - Have a large amount of CQC attacks given
Bee - Uses lots of scans
Chameleon - Prefer Team Sneaking rules.
Chicken - Rarely participate in battle.
Crocodile - Very good kill death ratio
Doberman - A Top-Class Soldier.
Dove - Perform a lot of non-lethal attacks.
Eagle - Large percents of headshots
Flying Squirrel - Have a high percentage of rolling
Fox - The Best Of The Best.
Foxhound - A Living Legend.
GA-KO - Prefer Rescue rules.
Grasshopper - Crawl the majority of the time.
Hound - A Superior Soldier.
Jaws - Large Amount of Knife Kills
Kerotan - Prefers Capture rules
Night Owl - Use the ENVG frequently.
Pidgeon - Prefers non lethal attacks
Pigeon - Prefers not to kill
Rat - Falls for a lot of traps
Sloth - Gets shot in the head a lot
Snake - Perfers sneaking missions
Tarantula - Have a large amount of Team Kills.
Tsuchinoko - Rarely play.
Turtle - Use the Cardboard box a lot
Water Bear - Have a high survival rate.
Remove frosty breath
When playing in stages where your breath frosts, have Snake play dead while prone. His frosty breath will no longer be seen by others.
Smoke for fun
You can use the colored smoke grenades to alter your character's voice. Toss a smoke grenade and make your character cough by it. The red smoke deepens it and slows it down somewhat. The green smoke restores it back to normal. The yellow smoke raises the pitch. White smoke has no affect and will not reset it. This effect does not wear off until you die or a new round starts.
Songs
Progress in your Metal Gear Solid 4: Guns Of The Patriots game to unlock new songs in Metal Gear Online. All songs will become unlocked with a cleared saved game file from Metal Gear Solid 4: Guns Of The Patriots. Note: Continuing a new game session on that cleared saved game file will cause all Metal Gear Online tracks to become locked again until you pass the point where they are normally unlocked.
Voice chat
When you use a USB or Bluetooth headset for voice chat and want to talk, hold Select to enable voice chat. You will see your name and the corresponding color of the team you are on at the left side of the screen. Hold Select again to disable voice chat.