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.
Complete Act 3 in one way.
Complete all City Takeover gameplay in the Downtown district.
Complete all City Takeover gameplay in the entire city of Steelport.
Destroy all Gang Operations in Steelport.
Beat all Missions in Co-op.
Complete Act 3 in another way.
Fully upgrade one Weapon in each slot.
Complete 'Murderbrawl XXXI'.
Customize 10 vehicles.
Taunt AND/OR Compliment 50 gang members.
Kill 50 brutes.
Find 100% of all Collectibles.
Complete all City Takeover gameplay in the Carver Island district.
Complete Act 1 in one way.
Kill all of the hitman Assassination targets.
Kill 25 Gang Members each with 'the Penetrator' AND the Fart in a Jar.
Complete 'Zombie Attack'.
Complete all City Takeover gameplay in the New Colvin district.
Complete all instances of Escort.
Complete all instances of Activities in Co-op.
Complete all instances of Snatch.
Complete all instances of Trafficking.
Complete all City Takeover gameplay in the Stanfield district.
Complete all instances of Mayhem.
Complete all instances of Heli Assault.
Spend over 30 hours in Steelport.
Complete all instances of Tank Mayhem.
Complete all instances of Insurance Fraud.
Complete all instances of Trail Blazing.
Complete all instances of Professor Genki's Super Ethical Reality Climax.
Play for at least 2 hours as a male character AND 2 hours as a female character.
Complete Act 2.
Complete 'http://deckers.die'.
Find 25% of all Collectibles.
Complete 'STAG Party'.
Complete 'The Ho Boat'.
Kill 1000 Gang Members.
Upgrade one Stronghold to its full glory.
Explore every hood in Steelport.
Complete all instances of Guardian Angel.
Complete your first Challenge.
Do your first nutshot AND testicle assault.
Complete Act 1 in another way.
Hijack 50 vehicles - Dukes style.
Complete 'We've Only Just Begun'.
Buy your first Upgrade from the Upgrade Store.
Play SR3 Co-op for 5 hours.
Complete 'Party Time'.
Complete 'I'm Free - Free Falling'.
Create and share a character online.
Complete 'When Good Heists...'.
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).
Throw 5 mascots into the water (in a single instance of Apocalypse Genki).
Roast 50 peds with the car’s flamethrower (in a single instance of Super Ethical PR Opportunity).
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).
Finish both instances of Apocalypse Genki.
Destroy a mouse ATV during Sexy Kitten Yarngasm.
Cause $150,000 worth of damage in a single Sexy Kitten Yarngasm combo.
Complete all missions for Gangstas in Space.
Perform all vehicle stunts with the Aegean.
Destroy 10 enemy spacecraft with the Aegean while filming.
Kill 7 Space Amazons with melee attacks.
Kill Space Brutina.
Collect all 6 hidden clapboards.
Kill 35 Space Amazons with the Laser Pistol.
Destroy all enemy spacecraft during the chase scene.
Kill 15 cameramen.
Land on the Parachute Target during the rescue scene.
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.
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.