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