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