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