Here is the full list of all 67 Mafia II: Definitive Edition achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Kill 50 enemies
Finish "Jimmy's Vendetta" on any difficulty level.
Earn 1,000,000 points in "Jimmy's Vendetta."
Finish all Car Dealer missions in "Jimmy's Vendetta."
Kill your enemies in "Jimmy's Vendetta" with every weapon available in the game.
Destroy 100 vehicles in "Jimmy’s Vendetta."
Kill 100 enemies by headshots in "Jimmy's Vendetta."
Achieve a 10x point multiplier in "Jimmy's Vendetta."
Complete your first mission in "Jimmy's Vendetta."
Reach 200 points for one Drift in "Joe's Adventures."
Reach 2000 points for one velocity run in "Joe's Adventures."
Reach 10 different score actions in one mission in "Joe's Adventures."
Finish Joe's Adventures on any difficulty.
Finish the Cathouse level in "Joe's Adventures."
Finish the Supermarket level in "Joe's Adventures."
Finish the Connection level in "Joe's Adventures."
Reach 200 points for one Jump in "Joe's Adventures."
Finish the Witness level in "Joe's Adventures."
Push the chief witness into the ice lake in "Joe's Adventures."
Kill a total of 30 enemies using melee attacks
The police want you dead. Survive for 10 minutes.
Find all of the Playboy magazines
Drive at least 30 different vehicles
Help the woman fix her car in Home Sweet Home
Finish what you started
Finish the story on Medium difficulty level or higher
Finish the story on Hard difficulty level
Travel a total of 50 miles in one vehicle
Keep any vehicle at 30mpg or over for 5 or more minutes
Complete Chapter 14
Learn what it means to be a Scaletta
Pay a visit to an old friend
Rob 5 stores in under 5 minutes
Complete Chapter 13
Complete Chapter 12
Upgrade one your cars to the maximum level
Complete Chapter 11
Sell 5 vehicles to Derek at the dock
Settle the score with the Irish once and for all
Help Leo out of a tricky situation without getting caught
Complete Chapter 10
Clean up after Joe
Sell 5 vehicles to Mike Bruski at the scrapyard
Travel at 125mph
Complete Chapter 9
Buy your first luxury suit
Kill 5 enemies in rapid succession with a headshot
Complete Chapter 8
Complete Chapter 7
Complete Chapter 6
Complete Chapter 5
Show that you know how to treat a lady
Complete Chapter 4
Complete Chapter 3
Sell all the gas stamps before the time runs out
Get all wheels of your car in the air for atleast 20 meters and then touch the ground again
Obtain the ration stamps without raising the alarm
Improve the dockworkers' haircuts
Complete Chapter 2
Do your first job for Mike Bruski
Upgrade one of your cars one level
Find at least one collectible in the game
Protect Francesca
Complete Chapter 1
Find all of the wanted posters
Drive a total of 1,000 miles in vehicles in "Jimmy's Vendetta."
Kill 1,000 enemies in "Jimmy's Vendetta."