All Confirmed Unlockables/DLC
Starting Characters:

COG: Marcus, Dom, Cole, Baird, Anya
Locust: Drone, Savage Drone, Grenadier Elite, Savage Grenadier, Myrrah

Rank Progression Characters:

COG Gear - Level 2
Miner - Level 3
Sam Byrne - Level 4
Beast Rider - Level 5
Dizzy Wallin - Level 7
Hunter - Level 8
Jace Stratton - Level 10
Theron Guard - Level 12
Clayton Carmine - Level 14
Classic Dom - Level 17
Spotter - Level 20
Classic Cole - Level 23
Flame Grenadier - Level 26
Classic Baird - Level 30
Benjamin Carmine - Level 34
Grenadier - Level 39
Civilian Anya - Level 45
Victor Hoffman - Level 50
Hunter Elite - Level 60
Anthony Carmine - Level 75

Medal/Miscellaneous Unlock Characters:

Classic Marcus - Silver Veteran Medal (Play 200 Matches)
Unarmored Marcus - Complete the Campaign, Any Difficulty.
Superstar Cole - Gold MVP Medal (MVP 100 Matches)
Chairman Prescott - Silver Allfathers Medal (Play 200 Matches in all 6 Game Modes)
Golden Gear - Bronze War Supporter Medal (Play in 5 Gears Events)
Savage Theron Guard - Beat Beast Mode, All Difficulties.
Kantus - Gold Medic Medal (Revive 150 Teammates)
Sniper - Bronze Headshot Medal (Get 100 Headshots)
Golden Hunter - Gold Master-At-Arms Medal (Get 3,000 Kills with all 5 Starting Weapons)
Golden Miner - Gold Rifleman Medal (Get 300 Kills with all 3 Rifles)
Griffin - Facebook Promotion or Gold Big Spender Medal ($300,000 in Horde cash)
Cole Train - Through the Beta or a currently unknown way in the Retail.

Pre-Order Characters:

Commando Dom - GameStop Pre-order Exclusive
Mechanic Baird - Bestbuy Pre-order Exclusive
Savage Kantus - Amazon Pre-order Exclusive
Savage Grenadier Elite - Walmart Pre-order Exclusive
Adam Fenix - Exclusive to Limited, Console and Epic Editions (Or if you redeemed your Gears Infected Omen Controller code before 9/9/11)

DLC Characters:

Bernie Mataki - Confirmed for 1st DLC in November
Onyx Guard - Confirmed for 1st DLC in November
Tai Kaliso
Ming Young Kim
RAAM
Skorge
Michael Barrick

DLC Maps:

Azura - Confirmed for 1st DLC in November
Rust Lung - Confirmed for 1st DLC in November

Weapon Unlocks:

Crimson Omen Lancer - 12 + 2 XBL Gold Card Promotion
Crimson Omen Hammerburst - Welcome to Beast (Survive all 12 waves of Beast mode)
Crimson Omen Retro Lancer - Welcome to Horde (Survive the first 10 waves of Horde mode)
Crimson Omen Gnasher - Welcome to Versus (Kill 10 enemies in Team Deathmatch)
Crimson Omen Sawed-Off - Welcome to Arcade (Complete 5 Arcade Campaign chapters in co-op)

Team Insignia Retro - Bronze Veteran Medal (Play 100 Matches)
Team Insignia Lancer - Silver Veteran Medal (Play 200 Matches)
Team Insignia Hammerburst - Gold Veteran Medal (Play 300 Matches)
Team Insignia Shotgun Set - Onyx Veteran Medal (Play 400 Matches)

Flaming Hammerburst - Unlocked if you played the beta between April 18th - April 24th.
Flaming Lancer - Unlocked if you played the beta between April 25th - May 1st.
Flaming Retro Lancer - No information at the moment...
Flaming Sawed-Off - Unlocked if you played the beta between May 2nd - May 8th.
Flaming Gnasher - Unlocked if you played the beta between May 9th - May 15th.

Gold Lancer - Play Gears 3 online between Sept. 20th and Sept. 27th or Download codes from Gears of War 2 (Carries over if you already have them).
Gold Hammerburst - Play Gears 3 online between Sept. 20th and Sept. 27th or Download codes from Gears of War 2 (Carries over if you already have them).
Gold Retro Lancer - Unlocked in beta (complete 90 matches and get 100 kills with the gold Retro Lancer) or can also be unlocked by getting Veteran Gear in Gears 2.
Gold Gnasher - Unlocked by getting Veteran Gear in Gears 2.
Gold Sawed-Off - Unlocked via the Commando achievement in Gears of War 1 (Complete Gears of War 1 on Insane).

(NOTE - Veteran Gear Achievement in Gears 2 unlocks the gold skin for all five starting weapons after TU1)

Chrome Lancer - In Gears 1, finish a ranked match with the highest amount of points.
Chrome Hammerburst - Complete 10 waves of Horde, on any difficulty, on any map, in Gears 2.
Chrome Retro Lancer - In Gears 1, complete 10 different co-op chapters as Dominic Santiago on any difficulty.
Chrome Gnasher - Complete the campaigns of Gears of War 1, 2 and 3, on any difficulty.
Chrome Sawed-Off – Have at least one achievement from Gears of War PC.

Onyx Lancer – Get 6000 kills with the Lancer in Gears 3.
Onyx Hammerburst – Get 6000 kills with the Hammerburst in Gears 3.
Onyx Retro Lancer – Get 6000 kills with the Retro Lancer in Gears 3.
Onyx Gnasher – Get 6000 kills with the Gnasher in Gears 3.
Onyx Sawed-Off – Get 6000 kills with the Sawed-Off in Gears 3.

Gold Omen (all 5 starting weapons) - Reach level 100 in Gears of War 3.
Infected Omen (all 5 starting weapons) - Included with the Gears of War 3 Epic Edition, LE Console or LE Controller (if redeemed before 9/9 otherwise just Lancer).

Liquid Metal (all 5 starting weapons)- Included with the Gears of War 3 Season Pass.
Green (all 5 starting weapons) - Obtained (for free) through a yet to be announced promotion.
White/Ivory (all 5 starting weapons) - Exclusive to Epic employees or those who are close friends with Joe Graf.

DLC Weapon Skins (thanks to Toast Wizard)

Garish -
Arctic -
Desert Digital -
Desert Camo -
Deadly Cute (Pink) -
Childs Play -
Blood -
Electric (Lightning) -
Flower -
Haze -
Immulsion -
Rainbow -
Team Pulse -
Oil Slick -
Ocean -
Thunderstorm -
Team Distress -
Team Metal -
Tiger Stripe -
Jungle -
Tribal -
Urban -
They will all be available day 1 for an as of now unanouced price

  why so many weapon skins?? gold,crimson omen,chrome,onyx,etc   

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Added on September 13, 2011, 8:36 amqudeenz360,
WTFcuk kuden  now u retired ur GT
I'll blacklist ur GT easier   

why so many weapon skins??

What special event on Horde right now? 100% ticker.

anybody interested in joining this?
thinking bout creating LYN brotherhood, but i dont have enuf exp to be the leader/founder/recuiter/or whatevershlt,
would somebody create it and we all join?

Aper benda nie bro? Cer citer sket. Panjang sgt nak baca...