Full list of all 61 Just Cause 4 achievements worth 2,500 gamerscore. It takes around 50-60 hours to unlock all of the achievements in the base game.
The base game contains 34 achievements worth 1,000 Gamerscore, and there are 3 DLC packs containing 27 achievements worth 1,500 Gamerscore.
Earned all Just Cause 4 Achievements
Secured every Supply Drop Blueprint
Filmed every Speed Stunt
Filmed every Vehicle Stunt
Filmed every Wingsuit Stunt
Discovered every Location in the game
Uncovered every Ancient Statue
Recruited every Pilot
Reached Army of Chaos Level 14
Got on the Leaderboard for every Feat
Stood on foot at the highest point in Solís
Secured all Small Arms and Heavy Weapons Blueprints
Secured every Region
Secured Illapa
Finished Operation Sandstinger
Helped Garland King finally finish her picture
Helped Sargento stop an invasion of Black Hand reinforcements
Used only the Booster for 15 non-consecutive minutes
Destroyed a vehicle with the PBX Auto-Slug 4 shotgun's "Ricochet" secondary fire
Destroyed every Surveillance Airship
Finished Operation Windwalker
Unlocked every Grappling Hook Mod
Secured every Factory
Removed all rigged vehicles from the harbors of Solís
Discovered 50% of all discoverable Locations
Finished Operation Thunderbarge
Crashed into a flying airplane with your own plane
Uncovered the mysteries of the Lost Tomb of Otorongo
Used only the Air Lifter for 15 non-consecutive minutes
Turned 10 Black Hand into Cows using the Cow Gun
Helped Sargento with his ambush, met Javi Huerta, and got carried away by Garland King
Beat someone's score while manually tracking the Feat
Increased your Army of Chaos Level by filling up the Chaos bar
Used only the Retract for 15 non-consecutive minutes
Earned a B Rank in the Gearheads' Godsbowl Trial Rampage
Destroyed 25 vehicles during a single challenge
Destroyed 15 vehicles during a single challenge
Earned a B Rank in the Trial of Initiation
Earn a B Rank in the Trial of Triumph
Earn a B Rank in LNP's Isla Intensa Trial Run
Earn a B Rank in Los Artistas' La Ratonera Survival Trial
Drive through all AR tiger images in the Solino Underground's challenges
Earn an S Rank in every course in the Solino Underground
Finished Extermination
Abolished the Infestation on the Mountain
Exorcised the Infestation at the Church
Expelled the Infestation at the Farm
Obliterated the Infestation at the Crash
Liquidated the Infestation at the Lake
Eradicated the Infestation at the Compound
Purged the Infestation on the Mainland
Created a Cow Demon
Finished The Artifact
Defeated Emerson Miller
Defeated 10 enemies during a single Agency drone ride
Rode a friendly Agency drone for 1,000 meters, without getting off it
Rode the Hoverboard for a total of 10,000 meters (electro-mag cables don't count!)
Reached 200 km/h with the Hoverboard for 10 seconds while grappled to a vehicle
Grappled to an Agent who's reeling through the air, and reel-kicked them
Defeat an Agent riding an Agency drone while riding an Agency drone yourself
Complete all Agency Hoverboard Courses in 20 seconds or less