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.
Complete all instances of Activities in Co-op.
Spend over 30 hours in Steelport.
Steal and deliver all Vehicle Theft targets.
Customize 10 vehicles.
Kill 25 Gang Members each with 'the Penetrator' AND the Fart in a Jar.
Kill all of the hitman Assassination targets.
Taunt AND/OR Compliment 50 gang members.
Fully upgrade one Weapon in each slot.
Find 100% of all Collectibles.
Complete all City Takeover gameplay in the Stanfield district.
Complete all City Takeover gameplay in the entire city of Steelport.
Complete all instances of Trail Blazing.
Complete all instances of Snatch.
Complete all instances of Heli Assault.
Complete all instances of Mayhem.
Destroy all Gang Operations in Steelport.
Complete all City Takeover gameplay in the New Colvin district.
Complete all instances of Trafficking.
Kill 50 brutes.
Complete all instances of Escort.
Complete all instances of Tank Mayhem.
Complete all City Takeover gameplay in the Carver Island district.
Complete all instances of Insurance Fraud.
Complete all instances of Professor Genki's Super Ethical Reality Climax.
Complete all City Takeover gameplay in the Downtown district.
Beat all Missions in Co-op.
Complete Act 3 in one way.
Complete Act 3 in another way.
Find 25% of all Collectibles.
Create and share a character online.
Complete 'Murderbrawl XXXI'.
Play SR3 Co-op for 5 hours.
Complete 'Zombie Attack'.
Do your first nutshot AND testicle assault.
Complete Act 2.
Complete 'http://deckers.die'.
Complete all instances of Guardian Angel.
Complete 'STAG Party'.
Play for at least 2 hours as a male character AND 2 hours as a female character.
Complete 'The Ho Boat'.
Complete your first Challenge.
Explore every hood in Steelport.
Kill 1000 Gang Members.
Upgrade one Stronghold to its full glory.
Complete Act 1 in one way.
Complete Act 1 in another way.
Hijack 50 vehicles - Dukes style.
Complete 'We've Only Just Begun'.
Complete 'Party Time'.
Buy your first Upgrade from the Upgrade Store.
Complete 'I'm Free - Free Falling'.
Complete 'When Good Heists...'.
Complete all activity instances in Genki Bowl VII.
Kill all of the rooftop mascots (in a single instance of Sad Panda Skyblazing).
Land on Magarac Island (in Sad Panda Skyblazing).
Fly through all of the rings (in a single instance of Sad Panda Skyblazing).
Destroy a mouse ATV during Sexy Kitten Yarngasm.
Cause $150,000 worth of damage in a single Sexy Kitten Yarngasm combo.
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).
Finish both instances of Apocalypse Genki.
Throw 5 mascots into the water (in a single instance of Apocalypse Genki).
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.