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 3 in one way.
Steal and deliver all Vehicle Theft targets.
Complete ALL Challenges.
Customize 10 vehicles.
Fully upgrade one Weapon in each slot.
Spend over 30 hours in Steelport.
Kill 25 Gang Members each with 'the Penetrator' AND the Fart in a Jar.
Complete Act 3 in another way.
Complete 'Murderbrawl XXXI'.
Complete all City Takeover gameplay in the Stanfield district.
Complete all City Takeover gameplay in the entire city of Steelport.
Complete all instances of Snatch.
Destroy all Gang Operations in Steelport.
Complete all City Takeover gameplay in the Downtown district.
Complete 'STAG Party'.
Complete 'http://deckers.die'.
Complete Act 2.
Complete 'Zombie Attack'.
Complete all City Takeover gameplay in the New Colvin district.
Complete all City Takeover gameplay in the Carver Island district.
Complete all instances of Trafficking.
Complete all instances of Heli Assault.
Kill all of the hitman Assassination targets.
Taunt AND/OR Compliment 50 gang members.
Complete 'The Ho Boat'.
Upgrade one Stronghold to its full glory.
Complete all instances of Guardian Angel.
Complete all instances of Escort.
Complete all instances of Mayhem.
Kill 50 brutes.
Complete all instances of Trail Blazing.
Complete all instances of Insurance Fraud.
Complete all instances of Tank Mayhem.
Find 100% of all Collectibles.
Find 25% of all Collectibles.
Play for at least 2 hours as a male character AND 2 hours as a female character.
Complete all instances of Professor Genki's Super Ethical Reality Climax.
Kill 1000 Gang Members.
Explore every hood in Steelport.
Complete your first Challenge.
Do your first nutshot AND testicle assault.
Hijack 50 vehicles - Dukes style.
Complete Act 1 in another way.
Complete Act 1 in one way.
Complete 'We've Only Just Begun'.
Buy your first Upgrade from the Upgrade Store.
Complete 'Party Time'.
Complete 'I'm Free - Free Falling'.
Create and share a character online.
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).
Destroy 5 chase vehicles (in a single instance of Super Ethical PR Opportunity).
Land on Magarac Island (in Sad Panda Skyblazing).
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).
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 activity instances in Genki Bowl VII.
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.
Collect all 6 hidden clapboards.
Kill 35 Space Amazons with the Laser Pistol.
Kill 7 Space Amazons with melee attacks.
Destroy all enemy spacecraft during the chase scene.
Kill 15 cameramen.
Land on the Parachute Target during the rescue scene.
Complete all missions for "The Trouble With Clones".
Prevent Johnny Tag from taking damage on the Magarac Bridge.
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.
Hold Your Position at Technically Legal using only melee attacks.