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.
Beat all Missions in Co-op.
Complete all instances of Activities in Co-op.
Play SR3 Co-op for 5 hours.
Complete ALL Challenges.
Complete Act 3 in one way.
Kill all of the hitman Assassination targets.
Spend over 30 hours in Steelport.
Customize 10 vehicles.
Steal and deliver all Vehicle Theft targets.
Taunt AND/OR Compliment 50 gang members.
Create and share a character online.
Complete Act 1 in another way.
Do your first nutshot AND testicle assault.
Kill 25 Gang Members each with 'the Penetrator' AND the Fart in a Jar.
Kill 50 brutes.
Fully upgrade one Weapon in each slot.
Play for at least 2 hours as a male character AND 2 hours as a female character.
Hijack 50 vehicles - Dukes style.
Complete Act 3 in another way.
Complete 'Zombie Attack'.
Complete 'Murderbrawl XXXI'.
Complete Act 2.
Complete 'STAG Party'.
Complete 'http://deckers.die'.
Upgrade one Stronghold to its full glory.
Complete all City Takeover gameplay in the New Colvin district.
Complete all City Takeover gameplay in the entire city of Steelport.
Destroy all Gang Operations in Steelport.
Complete all City Takeover gameplay in the Downtown district.
Find 100% of all Collectibles.
Complete all City Takeover gameplay in the Carver Island district.
Complete all instances of Mayhem.
Complete all City Takeover gameplay in the Stanfield district.
Complete all instances of Snatch.
Complete all instances of Trail Blazing.
Complete all instances of Insurance Fraud.
Complete all instances of Escort.
Complete 'The Ho Boat'.
Complete all instances of Tank Mayhem.
Find 25% of all Collectibles.
Complete all instances of Trafficking.
Complete all instances of Heli Assault.
Complete all instances of Professor Genki's Super Ethical Reality Climax.
Kill 1000 Gang Members.
Explore every hood in Steelport.
Complete all instances of Guardian Angel.
Complete your first Challenge.
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'.
Complete 'When Good Heists...'.
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).
Cause $150,000 worth of damage in a single Sexy Kitten Yarngasm combo.
Destroy 5 chase vehicles (in a single instance of Super Ethical PR Opportunity).
Roast 50 peds with the car’s flamethrower (in a single instance of Super Ethical PR Opportunity).
Land on Magarac Island (in Sad Panda Skyblazing).
Finish both instances of Apocalypse Genki.
Destroy a mouse ATV during Sexy Kitten Yarngasm.
Collect all 6 hidden clapboards.
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 7 Space Amazons with melee attacks.
Kill 35 Space Amazons with the Laser Pistol.
Destroy all enemy spacecraft during the chase scene.
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.
Hold Your Position at Technically Legal using only melee attacks.
Complete mission 'Weird Science'.
Destroy 45 Police and Swat Vehicles while protecting Jimmy's car.