Here is a full listing of the current medals in Battlefield 2142 as well as the requirements needed to receive them.
IASR = In A Single Round
Bronze Star

- IASR: Third Place
Silver Star

- IASR: Second Place
Gold Star

- IASR: First Place
Infantry Combat Medal

- IASR: 1 Distinguished Combat Efficiency Pin
- Global: 1 Support Service Badge Bronze
- Global: 1 Recon Service Badge Bronze
- Global: 1 Assault Service Badge Bronze
- Global: 1 Engineering Badge Bronze
- Global: 1 Collectors Badge Bronze
- Global: 1 Pistol Commendation Badge Bronze
- Global: 1 Explosive Gallantry Badge Bronze
Meritorious Infantry Combat Medal

- IASR: 1 Distinguished Combat Efficiency Pin
- Global: 1 Support Service Badge Silver
- Global: 1 Recon Service Badge Silver
- Global: 1 Assault Service Badge Silver
- Global: 1 Engineering Badge Silver
- Global: 1 Collectors Badge Silver
- Global: 1 Pistol Commendation Badge Silver
- Global: 1 Explosive Gallantry Badge Silver
Infantry Combat of Merit Medal

- IASR: 1 Distinguished Combat Efficiency Pin
- Global: 1 Support Service Badge Gold
- Global: 1 Recon Service Badge Gold
- Global: 1 Assault Service Badge Gold
- Global: 1 Engineering Badge Gold
- Global: 1 Collectors Badge Gold
- Global: 1 Pistol Commendation Badge Gold
- Global: 1 Explosive Gallantry Badge Gold
Distinguished Service Medal

- IASR: 30 Teamwork Score
- Global: 50 Commander Hours
- Global: 50 Hours As Squad Leader
- Global: 50 Hours As Squad Member
Medal of Gallantry

- Global: 150 Total Hours Played
- Global: 1000 Captured Control Points
- Global: 400 Defending Control Points
- Global: 5000 Teamwork Score
European Honorific Cross

- IASR: 3 Played Minutes as EU Team
- Global: 150 Played Hours as EU Team
- Global: 70 Best Round EU Team
- Global: 300 Wins EU Team
Distinguished Pan Asian Star

- IASR: 3 Played Minutes as PAC Team
- Global: 150 Played Hours as PAC Team
- Global: 70 Best Round PAC Team
- Global: 300 Wins PAC Team
Meritorious Conquest Medal

- IASR: 1 Explosive Efficiency Pin
- Global: 80 Hours played Conquest
- Global: 8000 Kills in Conquest mode
- Global: 25 Best kill streak
Meritorious Titan Medal

- IASR: 1 Problem Solver Pin
- Global: 80 Hours played in Titan mode
- Global: 8000 Kills in Titan game mode
- Global: 25 Best kill streak in Titan mode
Aircraft Combat Medal

- IASR: 30 Kills with Air Vehicle
- Global: 100 Hours in Air Vehicle
- Global: 8000 Kills with Air Vehicle
Armor Service Medal

- IASR: 25 Kills with Armor
- Global: 100 Hours in Armor
- Global: 8000 Kills with Armor
Good Conduct Medal

- IASR: 27 Total Kills
- IASR: 0 No Team Kills or Team/Vehicle Damage
- Global: 180 Total Hours Played
Honorable Service Medal

- Global: 100 Total Hours Played
- Global: 400 Heals
- Global: 400 Repair points
- Global: 400 Resupply
Purple Heart

- IASR: 5 Kill:Death ratio
Air Transport Transfer Medal

- IASR: 10 Titan Air Drops
- Global: 25 Hours in Transport Air
Titan Medallion

- IASR: 10 Kills in Titan game mode
- Global: 150 Hours played in Titan mode
- Global: 70 Best Round Titan mode
- GGlobal: 200 Wins Titan mode
Ground Base Medallion

- IASR: 20 Total Kills
- Global: 100 Captured Control Points
- Global: 200 Repair points