Here is the full list of all 44 Star Renegades achievements worth 1,000 gamerscore.
Finished Tutorial - Part 1
Finished Tutorial - Part 2
Defeat first Lieutenant
Defeat first Commander
Defeat Menku Behemoth
Defeat Norosh Behemoth
Defeat Dagan Behemoth
Defeat Herald
Defeat Overseer
Unlocked first level of Camaraderie
Unlocked first Combo
Unlocked first Progeny
Unlocked first Research Upgrade
Purchased first Droid Upgrade
Purchased first new Hero
Purchased first Hero Perk
Executed first Combo
Failed 1 time
Failed 5 times
Failed 10 times
Failed 20 times
Victorious 1 time
Victorious 13 times
Victorious 25 times
Victorious 50 times
Victorious 100 times
Destroyed 10 Imperium Soldiers
Destroyed 50 Imperium Soldiers
Destroyed 100 Imperium Soldiers
Destroyed 250 Imperium Soldiers
Destroyed 500 Imperium Soldiers
Destroyed 1000 Imperium Soldiers
Destroyed 10 Eternalists Worshippers
Destroyed 25 Eternalists Worshippers
Destroyed 50 Eternalists Worshippers
Destroyed 100 Eternalists Worshippers
Destroyed 10 Syndicate Gangsters
Destroyed 25 Syndicate Gangsters
Destroyed 50 Syndicate Gangsters
Destroyed 100 Syndicate Gangsters
Destroyed 10 Warmonger Employees
Destroyed 25 Warmonger Employees
Destroyed 50 Warmonger Employees
Destroyed 100 Warmonger Employees