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.
Customize 10 vehicles.
Complete 'I'm Free - Free Falling'.
Complete 'When Good Heists...'.
Complete all City Takeover gameplay in the Carver Island district.
Complete all City Takeover gameplay in the entire city of Steelport.
Complete all instances of Trail Blazing.
Complete ALL Challenges.
Taunt AND/OR Compliment 50 gang members.
Complete all City Takeover gameplay in the Stanfield district.
Steal and deliver all Vehicle Theft targets.
Kill all of the hitman Assassination targets.
Complete Act 3 in one way.
Complete Act 3 in another way.
Complete 'Murderbrawl XXXI'.
Complete 'Zombie Attack'.
Kill 25 Gang Members each with 'the Penetrator' AND the Fart in a Jar.
Complete all City Takeover gameplay in the Downtown district.
Complete all instances of Insurance Fraud.
Complete all instances of Escort.
Complete all instances of Snatch.
Complete Act 2.
Complete 'http://deckers.die'.
Complete 'STAG Party'.
Complete all instances of Guardian Angel.
Destroy all Gang Operations in Steelport.
Complete all instances of Trafficking.
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.
Complete all City Takeover gameplay in the New Colvin district.
Fully upgrade one Weapon in each slot.
Complete all instances of Mayhem.
Upgrade one Stronghold to its full glory.
Complete 'The Ho Boat'.
Create and share a character online.
Complete all instances of Heli Assault.
Complete Act 1 in another way.
Kill 50 brutes.
Spend over 30 hours in Steelport.
Find 100% of all Collectibles.
Complete all instances of Tank Mayhem.
Play SR3 Co-op for 5 hours.
Do your first nutshot AND testicle assault.
Find 25% of all Collectibles.
Complete Act 1 in one way.
Complete 'We've Only Just Begun'.
Kill 1000 Gang Members.
Hijack 50 vehicles - Dukes style.
Explore every hood in Steelport.
Complete your first Challenge.
Complete 'Party Time'.
Buy your first Upgrade from the Upgrade Store.
Kill all of the rooftop mascots (in a single instance of Sad Panda Skyblazing).
Complete all activity instances in Genki Bowl VII.
Roast 50 peds with the car’s flamethrower (in a single instance of Super Ethical PR Opportunity).
Throw 5 mascots into the water (in a single instance of Apocalypse Genki).
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.
Finish both instances of Apocalypse Genki.
Destroy 5 chase vehicles (in a single instance of Super Ethical PR Opportunity).
Collect all 6 hidden clapboards.
Kill 7 Space Amazons with melee attacks.
Complete all missions for Gangstas in Space.
Destroy all enemy spacecraft during the chase scene.
Kill 15 cameramen.
Land on the Parachute Target during the rescue scene.
Perform all vehicle stunts with the Aegean.
Destroy 10 enemy spacecraft with the Aegean while filming.
Kill Space Brutina.
Kill 35 Space Amazons with the Laser Pistol.
Shoot down a helicopter with a Saints Flow fireball.
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.
Kill a Brute using only melee damage while under the influence of Saints Flow.
Complete mission 'Tour de Farce'.
Destroy 5 Steelport Guard vehicles during mission 'Tour de Farce'.
Spray 25 rabid fans with the Swarmitron.
Destroy 45 Police and Swat Vehicles while protecting Jimmy's car.
Complete mission 'Weird Science'.