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