Here is the full list of all 45 Saints Row: Gat Out of Hell achievements worth 1,000 gamerscore.
Completed ALL of the Challenges
Played Saints Row: Gat out of Hell Co-op for 3 hours
Flew from the roof of Snowball's Chance to Sinterpol HQ's roof, without landing
Spent over 20 hours in Hell
Killed 1000 Demons with any combination of Supernatural Powers
Got 250 kills with the Essence of Wrath
Killed 25 Arch Dukes
Killed 100 Demons using the Coldfire Aura Supernatural Power
Killed 25 Demons with each of the Seven Deadly Weapons
Flew for 250,000 meters
Got 250 kills with the Essence of Sloth
Got a Comet into the Ultor lobby
Got 100 kills with the God's Hammer
Found 75 Barnstorming Diversion locations
Stood on the tallest mast of the 'Queen Anne's Revenge'
Purchased 113 Supernatural Power Upgrades
Found 100% of all Soul Clusters
Found 64 Tomes
Flew for 500 meters while on fire
Conquered all of New Hades with 100% City Take Over
Stonified and Shatter Killed 100 Demons with the Stone Blast Supernatural Power
Smacked into the ceiling 10 times while wall running
Took down an Extraction Facility while on a motorcycle
Killed 150 Demons with the Stomp Supernatural Power
Chose a new element for all of your Supernatural Powers
Upgraded one weapon to the max
Killed an Arch Duke with a melee attack
Knocked a vehicle into the lava
Played for at least 2 hours as Gat and 2 hours as Kinzie
Shoot down a Spire missile with a blast while hovering
Died in the lava
Stayed in contact with the lava for 10 seconds without dying
Beat the game
Completed all open world gameplay in two districts of the city of New Hades
Flew continuously for 60 seconds
Had minions kill 100 Demons with the Summon Supernatural Power
Killed 50 of your own summoned Imps
Found 100 Soul Clusters
Stayed airborne during Supernatural Jumps or Flight for a combined 10 minutes of gameplay
Collected at least five Soul Clusters without touching the ground
Had five Imps attached to you at one time
Bought your first Upgrade from the Upgrade Store
Got your first Supernatural Powers
Car surf on a Comet while it explodes
In Torment Fraud, hit 5 vehicles in a row without touching the ground