Full list of all 49 Watch_Dogs achievements. It takes around 50-60 hours to unlock all of the achievements in the base game on Windows.
The base game contains 39 achievements, and there is 1 DLC pack containing 10 achievements.
Complete Act 1
Complete Act 2
Complete Act 3
Complete 20 Chicago South Club contracts
Complete 20 Militia contracts
Complete 20 Fixer contracts
Complete 29 driving missions
Complete 10 coop missions
Complete all side investigations
Kill 4 enemies at once by blowing up the RC Car