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 instances of Activities in Co-op.
Complete Act 3 in one way.
Beat all Missions in Co-op.
Play SR3 Co-op for 5 hours.
Play for at least 2 hours as a male character AND 2 hours as a female character.
Complete Act 1 in another way.
Complete ALL Challenges.
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.
Fully upgrade one Weapon in each slot.
Complete all City Takeover gameplay in the Carver Island district.
Complete all instances of Mayhem.
Complete all City Takeover gameplay in the New Colvin district.
Complete all instances of Escort.
Complete all City Takeover gameplay in the Stanfield district.
Steal and deliver all Vehicle Theft targets.
Complete all instances of Trail Blazing.
Find 100% of all Collectibles.
Complete Act 3 in another way.
Complete 'Murderbrawl XXXI'.
Complete all instances of Heli Assault.
Kill all of the hitman Assassination targets.
Complete 'Zombie Attack'.
Complete Act 2.
Spend over 30 hours in Steelport.
Kill 50 brutes.
Complete all instances of Professor Genki's Super Ethical Reality Climax.
Complete 'http://deckers.die'.
Taunt AND/OR Compliment 50 gang members.
Complete 'STAG Party'.
Kill 25 Gang Members each with 'the Penetrator' AND the Fart in a Jar.
Complete all instances of Snatch.
Complete all instances of Guardian Angel.
Complete all instances of Trafficking.
Complete all instances of Tank Mayhem.
Customize 10 vehicles.
Upgrade one Stronghold to its full glory.
Complete 'The Ho Boat'.
Kill 1000 Gang Members.
Complete all instances of Insurance Fraud.
Find 25% of all Collectibles.
Complete Act 1 in one way.
Complete 'We've Only Just Begun'.
Hijack 50 vehicles - Dukes style.
Create and share a character online.
Complete 'Party Time'.
Complete your first Challenge.
Explore every hood in Steelport.
Do your first nutshot AND testicle assault.
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).
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).
Cause $150,000 worth of damage in a single Sexy Kitten Yarngasm combo.
Destroy a mouse ATV during Sexy Kitten Yarngasm.
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 7 Space Amazons with melee attacks.
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.
Prevent Johnny Tag from taking damage on the Magarac Bridge.
Destroy 45 Police and Swat Vehicles while protecting Jimmy's car.
Hold Your Position at Technically Legal using only melee attacks.
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'.