Here is the full list of all 12 Duke Nukem: Manhattan Project achievements worth 200 gamerscore.
Finish ‘Chinatown Chiller’
Finish ‘Metro Mayhem’
Finish ‘Unholy Underworld’
Finish ‘Fearsome Factory’
Finish ‘Tanker Trouble’
Finish ‘Deviant Drilling’
Stomp on 20 enemies.
Collect 120 Nuke symbols.
Finish the first level in under 3 minutes.
Finish ‘Orbital Oblivion’
Finish ‘Rooftop Rebellion’
Kill 75 enemies.