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