This is not a full list.

Updates to the topic:
18th Feb.
- Added G3A1 max dmg change
- Categorized accuraccy changes
- Added sniper chest multiplier change
- Added more generic info of attachment changes
- Added shotgun damage changes
19th Feb.
- Added PDW damage changes
20th Feb.
Added G18 dmg drop-off start dist nerf
Added Slug & .44 upper chest damage multiplier

1. Damage changes
Assault Rifles:
All assault rifles except G3A1
Min damage 17 -> 18.4

G3A1
Min Damage 20 -> 22
Max damage 30 -> 34

Carbines
SCAR-H
Min Damage 17 -> 20

LMGs
M60 & M240B
Max damage 30 -> 34
Min damage 20 -> 22

PKP
Min damage 20 -> 22

M249, M27IAR, RPK-74M
Min damage 17 -> 18.4

Sniper rifles
All sniper rifles:
Upper chest damage multiplier 1 -> 1.25
Note that all the bolt-action sniper rifles will 1hit kill under distances of 15 meters

M98B
Max damage 95 -> 80
Dropoff start dist. 20 -> 15
Dropoff end dist. 75 -> 120

All other bolt-action sniper rifles
Max damage 75 -> 80
Min damage 55 -> 59
Dropoff start dist. 20 -> 15
Dropoff end dist. 75 -> 100

All semiautomatic sniper rifles except SKS:
Min damage: 34 -> 37.5
Dropoff start distance 12 -> 15

SKS
Dropoff end distance 50 -> 60

Shotguns
12g Slug (Auto & Semiauto)
Max damage 50 -> 75
Min damage 34 -> 37.5
Dropoff start dist. 8 -> 15
Dropoff end dist. 40 -> 50
Upper chest damage multiplier 1.0 -> 1.25

12g Slug (Pump-action)
Min damage 34 -> 37.5
Dropoff start dist. 8 -> 15
Dropoff end dist. 40 -> 50
Upper chest damage multiplier 1.0 -> 1.25

12g Frag (Auto & Semiauto)
Some weird things in the files, not 100% sure about frags yet.
Looks like only the min direct damage is reduced from 10 to 5

12g Frag (Pump-action)
Max direct hit damage 60 -> 67
Blast damage 30 -> 40

12g Buckshot
Max damage 20 -> 12.5
Dropoff start dist. 4 -> 8
Dropoff end dist. 25 -> 30

12g Flechette
Max damage 14.3 -> 11.2
Min damage 8.4 -> 8
Dropoff start dist. 12 -> 15
Dropoff end dist. 25 -> 30

PDWs
P90 & MP7
Min damage 10 -> 11
Drop-off end dist. 50 -> 40

PP2000
Min damage 10 -> 12.5

PDW-R
Min damage 12.5 -> 14.3
Drop-off start dist. 8 -> 4
Drop-off end dist. 50 -> 30

AS VAL
Min damage 16.7 -> 18.4
Drop-off start dist. 8 -> 4
Drop-off end dist. 50 -> 40

PP-19
Min damage 9.1 -> 12.5
Drop-off end dist. 50 -> 40

UMP-45
Min damage 12.5 -> 13.75

Pistols
G18
Drop-off start dist. 12 -> 8

.44 Magnum
It also gets the new 1.25x upper chest damage multiplier

2. Attachments

Fore grip
Basically before it reduced the horizontal recoil by 50%, in these files it reduces h-recoil only ~20-33% depending on weapon.
It also increases the minimum spread 20% ~ 50% depending on stance and weapon.

Suppressor
Suppressors will not reduce the damage anymore.
Now it will reduce the distance where damage starts/stops to drop off instead.
For most weapons it will decrease the min spread by 25% instead of 50%
Although looks like M60 will still have the same 50% effect.

Heavy barrel
For most of the weapons it decreases ADS min spread by 75 or 50% depending on weapon.
Recoil is still increased by 10 or 15% and HIP min spread by 20-25% depending on weapon.

It doesn’t make AN94 100% accurate anymore while aiming down the sight.
Reduces ADS min spread by 75% and only increases recoil by 10%, the hip fire penalty is 20% for AN94
G3A1 is same than AN94 except heavy barrel increases recoil 6.7% and hip fire is increased only 14.3%

For few weapons it also makes Spread increase per shot 10% higher.

It will also increase drop-off end distance by 50% making weapons more deadly at ranges between 50m and 90m, depending on weapon.

Flash suppressor
Will decrease recoil by 17 ~ 25% depending on weapon.
For most weapons it increases hip min spread by 20~25% but some weapons don’t have any hip accuracy penalty.

Extended magazine
There seems to be extended magazine for AS VAL which didn’t exist before.
With ext mag it will have 30 bullets in a mag instead of 20

3. Accuracy changes

Assault rifles
AEK971
ADS Min Spread, Not moving 0.2 -> 0.4
Recoil right 0.5 -> 0.3

AK74M
Recoil up 0.3 -> 0.28
FirstSRecoilMul 2 -> 1.5

AN94
Recoil up 0.45 -> 0.3
FirstSRecoilMul 1.5 -> 2

F2000
Recoil up 0.3 -> 0.26

FAMAS
Recoil left 0.6 -> 0.35
Recoil right 0.6 -> 0.5
Recoil decrease 15 -> 18
FirstSRecoilMul 2 -> 2.6

G3A1
Recoil up 0.55 -> 0.45
FirstSRecoilMul 1.2 -> 1.8

L85A2
Recoil left 0.4 -> 0.3
Recoil decrease 22 -> 18
Min spread, ADS, not moving 0.4 -> 0.2

M416
FirstSRecoilMul 2 -> 2.4

Carbines
AKS74u
Recoil up 0.3 -> 0.28
FirstSRecoilMul 2 -> 2.2

HK53
Recoil up 0.3 -> 0.28
Recoil left 0.3 -> 0.2
Recoil right 0.5 -> 0.35
Recoil decrease 22 -> 18

SCAR-H
Recoil decrease 15 -> 13

SG553
Recoil up 0.3 -> 0.25
FirstSRecoilMul 2.5 -> 2.2

QBZ-95B
Recoil left 0.5 -> 0.335
Recoil right 0.5 -> 0.335
Recoil decrease 22 -> 18
Min spread, ADS, not moving 0.4 -> 0.5

LMGs

M240
FirstSRecoilMul 1 -> 1.7

M249
FirstSRecoilMul 1 -> 2.2
Recoil decrease 15 -> 12

M60
FirstSRecoilMul 2 -> 1.5

MG36
Recoil decrease 15 -> 13
FirstSRecoilMul 1 -> 1.8

PKP
Recoil up 0.75 -> 0.65
Recoil decrease 7 -> 13
FirstSRecoilMul 1 -> 1.5
Max spread, ADS, not moving 1 -> 3

Type88
Recoil left 0.4 -> 0.3
Recoil right 0.4 -> 0.3
Recoil decrease 15 -> 12
FirstSRecoilMul 1.34 -> 1.5

RPK
Recoil decrease 15 -> 13
FirstSRecoilMul 2 -> 1.8

QBB-95
Recoil up 0.45 -> 0.37
Recoil left 0.1 -> 0.4
Recoil right 0.3 -> 0.4
FirstSRecoilMul 1 -> 2
Recoil decrease 15 -> 13

PDWs
AS VAL
Recoil left 0.2 -> 0.25
Recoil right 0.3 -> 0.45
Recoil decrease 22 -> 18

PDW-R
Recoil decrease 22 -> 18
FirstSRecoilMul 2.5 -> 2
Min spread, ADS, not moving 0.4 -> 0.5
Min spread, ADS, moving 0.6 -> 0.8
Min spread, HIP, not moving
^ Standing 1.5 -> 2
^ Crouching 1 -> 1.5
^ Prone 0.75 -> 1
Min spread, HIP, moving
^ Standing 2 -> 2.5
^ Crouching 1.5 -> 2
^ Prone 1.25 -> 1.5

MP7
Min spread, HIP, not moving, prone & crouching 0.75 -> 1.2
Min spread, HIP,moving, prone & crouching 1.25 -> 1.5

P90
Min spread, HIP, not moving, prone & crouching 0.75 -> 1.2
Min spread, HIP,moving, prone & crouching 1.25 -> 1.5

PP-19
Recoil decrease 25 -> 20
FirstSRecoilMul 2.5 -> 2
Min spread, HIP, not moving, prone & crouching 0.75 -> 1.2
Min spread, HIP,moving, prone & crouching 1.25 -> 1.5

PP2000
Min spread, HIP, not moving, prone & crouching 0.75 -> 1.2
Min spread, HIP,moving, prone & crouching 1.25 -> 1.5

UMP45
Min spread, HIP, not moving, prone & crouching 0.75 -> 1.2
Min spread, HIP,moving, prone & crouching 1.25 -> 1.5

Pistols

G18
Recoil up 0.7 -> 0.5

M9
RecoilDecrease 15 -> 30

M93R
Recoil up 0.5 -> 0.4
Recoil left 0.4 -> 0.2
Recoil right 0.4 -> 0.2
FirstSRecoilMul 2.5 -> 2

.44 Magnum
Spread increase 0.6 -> 0.3

[SOURCE]

Looking for class specific data? See:

Battlefield 3 Assault Class Weapon Damage

Battlefield 3: Engineer Class Weapon Damage

Battlefield 3: Support Class Weapon Damage

Battlefield 3: Recon Class Weapon Damage

Battlefield 3: All Weapons Class Weapon Damage

Weapon Damage

Rounds till Kill

Time till Kill

Also see our Full list of Ribbons and Metals page.

M-COM Attacker Ribbon
200 XP Bonus. Blow-up three M-Com Stations in one round. Try the Rush game mode and play as the Attackers, then activate and destroy (Thanks to Someone in the comments!) three M-Com Stations in one round to get this ribbon.

M-COM Defender Ribbon
200 XP Bonus. Defend 4 M-Com Stations in one round. Choose the Rush game mode and play as a Defender, to defend an M-Com Station, you have to kill an enemy while they’re trying to activate the bomb. Camp near the station and watch for players to approach, but don’t kill them until they start activating the bombs.

Flag Defender Ribbon
200 XP Bonus. Defend the flag 5 times in one round. To get this ribbon, play the Conquest game mode. For your kills to count towards this ribbon, you need to capture an area and defend it. Kill five enemies that enter to get this ribbon.

Flag Attacker Ribbon
200 XP Bonus. Capture 4 flags in one round. Again, play on the Conquest game mode. They last a long time, if you’re having trouble, bypass the hotspots and go for remote or unguarded flags to capture. You only need to capture them for this ribbon, not defend them.

Anti Vehicle Ribbon
200 XP Bonus. Destroy 3 enemy vehicles in one round. The Engineer class comes equipped with a Rocket Launcher or Anti-Vehicle mines, both are great for destroying enemy vehicles. Otherwise, just use a tank or helicopter.

Disable Vehicle Ribbon
200 XP Bonus. Disable 4 enemy vehicles in one round. Just disable the vehicle before destroying it, Anti-Vehicle mines are specifically built for disabling vehicles.

Stationary Emplacement Ribbon
200 XP Bonus. Kill 2 enemies with emplaced weapons in one round. Emplaced weapons include the TOW Launcher, the Centurion C-Ram, and the Kornet Launcher. Any large maps with vehicles will feature these weapons.

Air Warfare Ribbon
200 XP Bonus. Kill 6 enemies while driving an Air Vehicle in one round. If you aren’t good with flying, jump into the gunner seat of a Helicopter like the Viper of Havoc. Find these helicopters on these maps; Caspian Border, Operation Firestorm, Damavand Peak, Kharg Island, and the Noshahr Canals.

Transport Warfare Ribbon
200 XP Bonus. Kill 4 enemies with transport vehicles in a round. Transport vehicles carry troops into battle, and are mostly used to traverse long stretches in large maps. Use these light armored vehicles often to support your squad. (Thanks to Bob for the tip!)

Armored Warfare Ribbon
200 XP Bonus. Kill 7 enemies with land vehicles in one round. Find a tank, any of the large maps will feature them. Use the Engineer Class to keep the tank repaired if you’re worried about losing it.
Any tank will do. Most of the larger maps feature tanks.

Assault Rifle Ribbon (200 XP)
200 XP Bonus. Kill 7 enemies with Assault Rifles in a round. Play as the Assault Class here to unlock new and better assault rifles.

Light Machine Gun Ribbon
200 XP Bonus. Kill 7 enemies with Light Machine Guns in one round. Just play as the Support Class and go nuts.

Carbine Ribbon
200 XP Bonus. Kill 7 enemies with Carbines in one round. Take the Engineer Class to unlock better Carbines.

Sniper Rifle Ribbon
200 XP Bonus. Kill 7 enemies with Sniper Rifles in one round. Load up the Recon Class and go crazy.

Hand Gun Ribbon
200 XP Bonus. Kill 5 enemies with the Handgun in a round. Just use Handguns, try bringing the tactical light to blind your opponents, making them easier kills at close range.

PDW Ribbon
200 XP Bonus. Kill 7 enemies with any Personal Defense Arms. Mostly Submachine Guns or Machine Pistols count towards this reward. You’ll unlock them as you level up any class. Weapons that count towards this Ribbon are: PP-2000, UMP-45, PDW-R, P90, AS Val, MP7, MP5, PP-19.

Shotgun Ribbon
200 XP Bonus. Kill 7 enemies with Shotguns in one around. This is easy, just grab the Shotgun, any class can use it, and keep it until you rack up 7 kills.

Melee Ribbon
200 XP Bonus. Kill 4 enemies with melee weapons in one round. Just knife four people in a round, pick close-quarters maps like Metro to boost your chances of needing the knife in combat.

Avenger Ribbon
200 XP Bonus. Complete 2 Avenger Kills in one round. These kills are counted when you shoot down an enemy that just killed a teammate.

Savior Ribbon
200 XP Bonus. Complete 2 Savior Kills on one round. To unlock the ribbon, target enemies that are trying to kill your teammates.

Nemesis Ribbon
200 XP Bonus. Kill a Nemesis twice in one round. Anyone that has killed you 5 times counts as a Nemesis. Once someone is a Nemesis, you just need to kill them twice. Play Squad Rush for it’s small player count to boost your chances.

Accuracy Ribbon
200 XP Bonus. Get 5 headshouts in one round. Grab a Sniper Rifle and go nuts, you’ll eventually unlock this ribbon if you play Battlefield 3 long enough.

Suppression Ribbon
200 XP Bonus. Get 7 Suppression Assists in one round. Suppression Assists occur while you’re shooting at an enemy, and a teammate kills them. If you want to get this ribbon fast, play with a squad and only shoot near your enemies, don’t actually kill them.

Anti Explosives Ribbons
200 XP Bonus. Destroy 2 Enemy Explosives in one round. Anti-Vehicle Mines and C4 count as enemy explosives, you’ll find these most often in large vehicle-based maps.

Squad Spawn Ribbon
200 XP Bonus. Get 7 Squad Spawn bonuses in one round. You’ll get a bonus every time a squadmate uses you as a spawn point. If it happens 7 times, the ribbon is your’s. Try to coordinate with your squad for this ribbon.

Squad Wipe Ribbon
200 XP Bonus. Receive 2 Squad Wipe Bonuses in one round. Play in Squad Rush, you just need to wipe out an enemy squad twice.

Combat Efficiency Ribbon
500 XP Bonus. Get 3 Kill Streaks in one round. To get a streak, you need to kill 8 times in a row without dying yourself. Get 3 Kill Streaks of 8 to unlock this ribbon, try playing on infantry heavy maps to increase your chances early on.

Medical Efficiency Ribbon
200 XP Bonus. Complete 5 revives in one round. Play as the Assault Class to unlock the Defibrillator, and hang out with a squad, which inevitably will find someone getting shot.

Resupply Efficiency Ribbon
200 XP Bonus. Ressuply 7 times in one round. Choose the Support Class – make sure you resupply 7 times, ammo drop doesn’t count.

Maintenance Efficiency Ribbon
200 XP Bonus. Repair 7 times in one round. Switch to the Engineer Class and use the Repair Tool 7 times, the easiest way is either escorting a tank or driving a tank yourself, retreating after it takes damage and repairing.

Surveillance Efficiency Ribbon
200 XP Bonus. Get 5 Motion Sensor Assists in one round. To unlock this ribbon, you’ll need the MAV, unlockable through the Recon Class. The T-UGS does not work at this time.

Red Dot Sight: This sight is a good choice for giving you a clear view while aiming down the sights. It can also help you on those long range shots. This is a very good choice for the M4. The clear view it grants the user aids at all ranges.

ACOG Scope: This scope provides increased zoom while slowing down the aim time, slightly increasing recoil, but not increasing idle sway. It’s also very good scope to use in those long range fire fights. If you want to use this it is recommended that you use the kick proficiency, as this scope increases recoil a fair amount.

Holographic Sight: This sight improves short to mid-range target acquisition. It also sits higher on the mount, reducing the obscuring effect of flare and smoke through continuous fire. This is completely up to you whether you prefer it to the Red Dot.

Hybrid Sight: This sight is a mix of the Holographic sight with a 4x sight. This sight is very good in close and long range. You can switch between the 4x sight and Holographic sight. Again, this is up to personal preference. It does obstruct much of your peripheral vision, so there are trade offs to using this sight.

Thermal: The main purpose of this sight is to expose enemy movement. Enemy’s will appear as white-hot glowing through this scope. While visibility of the surrounding area is somewhat reduced, movement is highly visible. Players using Assassin will not be highlighted. Do not use this scope.

To earn it you must accumulate 25 kills (24 with tier two perk Hardline equipped) alone, without assistance from Assault or Support Strike Package rewards – a feat that requires map knowledge, situational awareness, a thought-out class setup, and depending on your skill level a generous helping of fluke.

Assault

• Best Friend Forever: FAMAS
  • 10 Revives
  • 10 Heals
• Professional Russian: L85A2
  • 100 Kills with Assault Rifles
  • 20 kills with underslung grenade launcher

Engineer

• Fixing it: HK53
  • 10 Repairs
  • Kill 1 enemy with Repair torch
• It goes Boom!: QBZ-95B
  • 50 AT Rocket Kills
  • Destroy 1 enemy vehicle with Repair torch
  • Win 5 rounds of conquest

Support

• Let it Rain: QBB-95 (Type 95 LMG)
  • 20 kills with LMGs
  • 2 Mortar kills
• Keep your Head Down: MG36
  • 100 Kills with LMGs
  • 50 Suppression assists
  • 50 Ammo resupplies

Recon

• Specops: QBU-88 (Type 88 Sniper)
  • 20 kills with sniper rifles
  • 5 laser designations
• Creeping Death: L96A1
  • 50 Headshots (note, this doesn’t specify with sniper rifles)
  • 50 Spot assists
  • 5 Knife takedowns

All Kits

• Familiar Territory: PP-19
  • Arm 10 Mcoms
  • Capture 10 flags
  • Play 2 hours on Karkand
• Scarred Veteran: MK3A1 Jackhammer
  • 10 Kills with PP19
  • 5 Kills in DPV Jeep
  • 10 kills in BTR-90 IFV
  • 2 hours on Sharqi
  • 2 hours on Gulf of Oman

Sure enough, there it was, staring me right in the face. Don’t know how I missed that, must of been to hasty just logging in and hitting play every time.

For those of you, I suspect very few as you all can probably read, that failed to see this option… here’s how to enable it.

Step 1: Go into OPTIONS

Step 2: Click DEDICATED SERVER

Step 3: Set ENABLE SERVER BROWSER to yes

Step 4: Back out and you’ll now see a SERVERS option. Click it

Step 5: Rejoice

Step 6: Thank Dennis

Also see our page: Prestige Symbols MW2, Black Ops, MW3

The last known reward is unlocking a single item from a custom class that you can carry throughout the rest of the prestige level. This would mostly likely mean you can pick your favorite weapon, perk, equipment or whatever you like and use it throughout the entire next rank instead of waiting to unlock it once again. Finally, if you are one of those people who enjoy prestige mode, you now have the option to reset all stats after prestiging.

You will be rewarded with prestige tokens in Modern Warfare 3 every time you prestige, However, if you have prestiged in any of the previous Call of Duty games, you will also be rewarded with a prestige token at the start of Modern Warfare 3. It is uncertain if you receive a prestige token for every level of prestige in previous games or just one token for any amount greater than one. There are some players who could have multiple tokens at the start of Modern Warfare 3!

In the shop, you can spend your tokens on the following rewards:

Here is a video of Robert Bowling talking about the prestige shop.

XBOX / PS3:

To report hackers on these consoles, Infinity Ward was kind enough to place an in-game report button in the lobby. Easy-peazy.

PC:

For some strange reason, Infinity Ward left out the in-game report button on the PC version where most hackers live. You can report them via Steam however.

First, launch Steam, then hit “View” in the menu bar.

Next, look for “Players”.

Once you see the hacker’s profile, click on “Report Violation”.

Make sure you check “Suspected Cheater”, add some details, and hit “Submit”

Done!

Steam giving you this error when trying to play MW3 this morning?

“This game is currently unavailable. Please try again at another time”

Apparently Steam was hacked recently forcing players to re-verify their local game content.

Dear Steam Users and Steam Forum Users:

Our Steam forums were defaced on the evening of Sunday, November 6. We began investigating and found that the intrusion goes beyond the Steam forums.

We learned that intruders obtained access to a Steam database in addition to the forums. This database contained information including user names, hashed and salted passwords, game purchases, email addresses, billing addresses and encrypted credit card information. We do not have evidence that encrypted credit card numbers or personally identifying information were taken by the intruders, or that the protection on credit card numbers or passwords was cracked. We are still investigating.

We don’t have evidence of credit card misuse at this time. Nonetheless you should watch your credit card activity and statements closely.

While we only know of a few forum accounts that have been compromised, all forum users will be required to change their passwords the next time they login. If you have used your Steam forum password on other accounts you should change those passwords as well.

We do not know of any compromised Steam accounts, so we are not planning to force a change of Steam account passwords (which are separate from forum passwords). However, it wouldn’t be a bad idea to change that as well, especially if it is the same as your Steam forum account password.

We will reopen the forums as soon as we can.
I am truly sorry this happened, and I apologize for the inconvenience.
Gabe.

Here’s how to correct the problem:

1. Open your library in Steam
2. Right click on MW3 multiplayer in the left screen
3. Hit properties
4. Click local files
5. Then hit verify integrity of game cache

Done!