The Gangstas in Space Add-on for Saints Row: The Third (DE) has 10 achievements worth 100 gamerscore.
Collect all 6 hidden clapboards.
Land on the Parachute Target during the rescue scene.
Complete all missions for Gangstas in Space.
Perform all vehicle stunts with the Aegean.
Destroy 10 enemy spacecraft with the Aegean while filming.
Kill Space Brutina.
Kill 7 Space Amazons with melee attacks.
Kill 35 Space Amazons with the Laser Pistol.
Destroy all enemy spacecraft during the chase scene.
Kill 15 cameramen.