Here is the full list of all 58 Marvel's Guardians of the Galaxy achievements worth 1,000 gamerscore.
Find and equip all Outfits.
Complete Marvel's Guardians of the Galaxy.
Defeat The Magus.
Complete Chapter 16.
Complete Chapter 15.
Defeat Grand Unifier Raker.
Complete Chapter 14.
Revive or Heal Companions 10 times with Groot's Gift of the Florae.
Invest in all Special Abilities for all Companions.
Complete Chapter 13.
Collect 65 % of all Galactic Compendium entries of each category.
Defeat Fin Fang Foom.
Acquire the Plasma Element for Star-Lord's guns.
Complete Chapter 12.
Defeat 10 enemies with Gamora's Executioner ability.
Defeat 10 enemies affected by Drax's Wrath of Katath ability.
Defeat 20 enemies with Rocket's Five Barrel Barrage.
Complete Chapter 11.
Survive the manifestations of Thanos.
Complete Chapter 10.
Invest in at least one Special Ability for Gamora, Drax, Rocket and Groot.
Acquire the Wind Element for Star-Lord's guns.
Interrupt a Charger with Groot's Call to Action.
Complete Chapter 9.
Pay your Nova Corps fine.
Complete Chapter 8.
Defeat 20 enemies with Star-Lord's Eye of the Hurricane.
Defeat the Meredith Quill delusion.
Complete Chapter 7.
Dismember an Inquisitor with Drax's Call to Action.
Find all of the Guardian Collectibles for one Guardian.
Find half of the Guardian Collectibles.
Interrupt a Nova Centurion with Gamora's Call to Action.
Execute a Flair Attack 10 times.
Acquire the Lightning Element for Star-Lord's guns.
Complete Chapter 6.
Defeat the Blood Brothers.
Complete Chapter 5.
Defeat 15 Staggered enemies with a Charged Shot.
Execute an Auto-Combo with Groot.
Attain the maximum possible Momentum 10 times.
Execute an Auto-Combo with Rocket.
Complete Chapter 4.
Defeat the Dweller-in-Darkness.
Defeat 15 enemies with Star-Lord's Fan the Hammer ability.
Revive a fallen team member.
Stagger 25 enemies.
Execute an Auto-Combo with Gamora.
Complete Chapter 3.
Interrupt a Slakebeast with Drax's Call to Action.
Acquire the Ice Element for Star-Lord's guns.
Find and equip one Outfit.
Complete Chapter 2.
Complete Chapter 1.
Capture the Quarantine Zone monster.
Execute an Auto-Combo with Drax.
Win the bet against Rocket.
Purchase your first Star-Lord Ability.