Full list of all 83 Saints Row: The Third achievements. It takes around 50-60 hours to unlock all of the achievements in the base game on Windows.
The base game contains 53 achievements, and there are 3 DLC packs containing 30 achievements.
Complete ALL Challenges.
Steal and deliver all Vehicle Theft targets.
Taunt AND/OR Compliment 50 gang members.
Kill all of the hitman Assassination targets.
Find 100% of all Collectibles.
Complete all instances of Activities in Co-op.
Beat all Missions in Co-op.
Find 25% of all Collectibles.
Fully upgrade one Weapon in each slot.
Kill 25 Gang Members each with 'the Penetrator' AND the Fart in a Jar.
Create and share a character online.
Upgrade one Stronghold to its full glory.
Complete Act 3 in one way.
Customize 10 vehicles.
Spend over 30 hours in Steelport.
Play SR3 Co-op for 5 hours.
Complete Act 1 in another way.
Play for at least 2 hours as a male character AND 2 hours as a female character.
Kill 50 brutes.
Complete all City Takeover gameplay in the New Colvin district.
Complete all City Takeover gameplay in the entire city of Steelport.
Complete all instances of Escort.
Complete all instances of Snatch.
Complete all City Takeover gameplay in the Downtown district.
Destroy all Gang Operations in Steelport.
Complete all instances of Heli Assault.
Complete all instances of Insurance Fraud.
Complete all City Takeover gameplay in the Carver Island district.
Complete all instances of Professor Genki's Super Ethical Reality Climax.
Complete all instances of Mayhem.
Complete all City Takeover gameplay in the Stanfield district.
Complete all instances of Trail Blazing.
Complete all instances of Trafficking.
Complete all instances of Tank Mayhem.
Complete Act 3 in another way.
Complete 'Murderbrawl XXXI'.
Complete 'Zombie Attack'.
Complete Act 2.
Complete 'http://deckers.die'.
Kill 1000 Gang Members.
Complete all instances of Guardian Angel.
Complete 'STAG Party'.
Complete 'The Ho Boat'.
Complete your first Challenge.
Explore every hood in Steelport.
Hijack 50 vehicles - Dukes style.
Complete Act 1 in one way.
Complete 'We've Only Just Begun'.
Buy your first Upgrade from the Upgrade Store.
Do your first nutshot AND testicle assault.
Complete 'Party Time'.
Complete 'I'm Free - Free Falling'.
Complete 'When Good Heists...'.
Roast 50 peds with the car’s flamethrower (in a single instance of Super Ethical PR Opportunity).
Kill all of the rooftop mascots (in a single instance of Sad Panda Skyblazing).
Throw 5 mascots into the water (in a single instance of Apocalypse Genki).
Cause $150,000 worth of damage in a single Sexy Kitten Yarngasm combo.
Destroy 5 chase vehicles (in a single instance of Super Ethical PR Opportunity).
Complete all activity instances in Genki Bowl VII.
Land on Magarac Island (in Sad Panda Skyblazing).
Fly through all of the rings (in a single instance of Sad Panda Skyblazing).
Finish both instances of Apocalypse Genki.
Destroy a mouse ATV during Sexy Kitten Yarngasm.
Collect all 6 hidden clapboards.
Kill 7 Space Amazons with melee attacks.
Land on the Parachute Target during the rescue scene.
Complete all missions for Gangstas in Space.
Perform all vehicle stunts with the Aegean.
Destroy 10 enemy spacecraft with the Aegean while filming.
Kill Space Brutina.
Kill 35 Space Amazons with the Laser Pistol.
Destroy all enemy spacecraft during the chase scene.
Kill 15 cameramen.
Kill a Brute using only melee damage while under the influence of Saints Flow.
Hold Your Position at Technically Legal using only melee attacks.
Complete all missions for "The Trouble With Clones".
Prevent Johnny Tag from taking damage on the Magarac Bridge.
Shoot down a helicopter with a Saints Flow fireball.
Spray 25 rabid fans with the Swarmitron.
Destroy 5 Steelport Guard vehicles during mission 'Tour de Farce'.
Complete mission 'Tour de Farce'.
Complete mission 'Weird Science'.
Destroy 45 Police and Swat Vehicles while protecting Jimmy's car.