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 300 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 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