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