Full list of all 48 Watch_Dogs achievements worth 1,250 gamerscore. It takes around 50-60 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 38 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 10 achievements worth 250 Gamerscore.
Complete Act 5
Unlock every song with the SongSneak app
Complete Act 4
Complete Act 3
Complete the final mission in the QR Code Investigation
Complete every Investigation
Escape a level 5 police scan
Complete the final mission of the Missing Persons Investigation
Collect all 8 Burner Phones
Complete Act 2
Complete the final mission in the Human Traffic Investigation
Escape 15 police scans
Complete level 10 against all 3 Drinking Game opponents
Complete 40 Fixer Contracts
Unlock every Skill in the Skills Tree
Complete the final mission in the Weapons Trade Investigation
Complete every Criminal Convoy
Kill 3 enemies with a single IED
Kill 4 enemies within a single instance of Focus
Complete Act 1
Complete every Gang Hideout
Complete 10 Public Online Races
Complete every Privacy Invasion
Complete every ctOS Breach
Check in at every Hotspot
Unlock every ctOS Tower
Escape a level 5 police chase
Participate in 5 different City Games
Use the Crime Detection System to take down 20 confirmed criminals
Shoot out a tire on 15 different vehicles
Using non-lethal takedown, stop 10 civilians from calling to report you
Tag 100 enemies
Invade and successfully hack 10 enemy Fixers in Online Hacking
Perform 10 vehicle take downs
Invade and successfully observe 10 enemy Fixers in Online Tailing
Complete an Online Tailing without being detected
Take down Maurice
Get tailed 5 times
T-Bone: Complete Act 3
T-Bone: Complete Act 2
T-Bone: Complete 29 driving missions
T-Bone: Complete 20 Chicago South Club contracts
T-Bone: Complete all side investigations
T-Bone: Kill 4 enemies at once by blowing up the RC Car
T-Bone: Complete Act 1
T-Bone: Complete 20 Fixers contracts
T-Bone: Complete 10 coop missions
T-Bone: Complete 20 Militia contracts