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 a total of 30 enemies using melee attacks
Sell 5 vehicles to Mike Bruski at the scrapyard
Drive at least 30 different vehicles
Keep any vehicle at 30mpg or over for 5 or more minutes
Kill 50 enemies
Finish the Witness level in "Joe's Adventures."
Push the chief witness into the ice lake in "Joe's Adventures."
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
Complete Chapter 14
Learn what it means to be a Scaletta
Pay a visit to an old friend
Complete Chapter 13
Complete Chapter 12
Complete Chapter 11
Kill 5 enemies in rapid succession with a headshot
Complete Chapter 10
Clean up after Joe
Complete Chapter 9
Travel at 125mph
Upgrade one your cars to the maximum level
Complete Chapter 8
Complete Chapter 7
Complete Chapter 6
Complete Chapter 5
Get all wheels of your car in the air for atleast 20 meters and then touch the ground again
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
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
Obtain the ration stamps without raising the alarm
Help Leo out of a tricky situation without getting caught
Travel a total of 50 miles in one vehicle
Sell 5 vehicles to Derek at the dock
Rob 5 stores in under 5 minutes
Buy your first luxury suit
The police want you dead. Survive for 10 minutes.
Find all of the Playboy magazines
Find all of the wanted posters
Settle the score with the Irish once and for all
Finish the Connection level in "Joe's Adventures."
Finish the Supermarket level in "Joe's Adventures."
Finish the Cathouse level in "Joe's Adventures."
Finish Joe's Adventures on any difficulty.
Reach 2000 points for one velocity run in "Joe's Adventures."
Reach 200 points for one Jump in "Joe's Adventures."
Reach 200 points for one Drift in "Joe's Adventures."
Reach 10 different score actions in one mission in "Joe's Adventures."
Complete your first mission in "Jimmy's Vendetta."
Achieve a 10x point multiplier in "Jimmy's Vendetta."
Drive a total of 1,000 miles in vehicles 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."
Finish all Car Dealer missions in "Jimmy's Vendetta."
Finish "Jimmy's Vendetta" on any difficulty level.
Earn 1,000,000 points in "Jimmy's Vendetta."
Kill 1,000 enemies in "Jimmy's Vendetta."