Flaming Skins:
http://www.youtube.com/watch?v=NjapVeGlie4
Hammerburst- Played a match during the Gears 3 VIP beta. (first week)
Lancer- Played a match in the Gears 3 open beta. (week two)
Sawed-Off- Played a match in the Gears 3 open beta. (week four)
Gnasher- Played a match in the Gears 3 open beta. (week three)
Gold Skins:
http://www.youtube.com/watch?v=VaZWARpgXSQ
Hammerburst- Acquired it during Gears 2 or unlocked "Veteran Gear" achievement from Gears 2 or play a online match in the first week of Gears 3
Lancer- Acquired it during Gears 2 or unlocked "Veteran Gear" achievement from Gears 2 or play a online match in the first week of Gears 3
Retro Lancer- Acquired it during the online beta for Gears 3 or unlocked the "Veteran Gear" achievement from Gears 2
Sawed-Off- Unlocked the "Commando" achievement from Gears 1 or unlocked the "Veteran Gear" achievement from Gears 2
Gnasher- Unlocked the "Veteran Gear" achievement from Gears 2
Chrome Skins:
Hammerburst- Unlocked "Dirty, Dirty Hoard" achievement from Gears 2
Lancer- Unlocked "Don't Hate The Player" achievement from Gears 1
Retro Lancer- Unlocked the" Domination" achievement from Gears 1
Sawed-Off- Unlocked ANY achievement from Gears of War 1 on PC
Gnasher- Completed campaign on Gears 1, Gears 2 and Gears 3
Onyx Skins:
Hammerburst- Unlock by getting the onyx medal for the Hammerburst (6000 kills)
Lancer- Unlock by getting the onyx medal for the Lancer (6000 kills)
Retro Lancer- Unlock by getting the onyx medal for the Retro Lancer (6000 kills)
Sawed-Off- Unlock by getting the onyx medal for the Sawed-Off (6000 kills)
Gnasher- Unlock by getting the onyx medal for the Gnasher (6000 kills)
Infected Omen Skins:
http://www.youtube.com/watch?v=v4HumIzWSl0
All 5 skins are available if you buy the Gears of War controller, the Gears of War Xbox 360 or the epic edition of Gears of War 3
Liquid Metal Skins:
http://www.youtube.com/watch?v=uRqMGFikpTw
All 5 skins are a "Gift" when you purchase the Gears of War 3 DLC season pass
Golden Omen Skins:
All 5 skins are unlocked one you reach level 100 in Gears of War 3
Liquid Green Skins:
http://www.youtube.com/watch?v=C-7r0kv2ppc
These skins are unknown for the time being, however Epic has stated these unique skins will be available via a marketing campaign before Gears of War 3 launches Sept. 20th
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It's better to die on your feet then to live on your knees.
http://www.gamespot.com/xbox360/action/g...pid=991468