Full list of all 55 Watch_Dogs 2 achievements worth 1,260 gamerscore. It takes around 40-50 hours to unlock all of the achievements in the base game.
The base game contains 49 achievements worth 1,000 Gamerscore, and there are 4 DLC packs containing 6 achievements worth 260 Gamerscore.
Complete 5 DedSec Events
Buy 25 cars in car dealerships
Successfully invade another hacker
Neutralize 1 Hunter in Bounty Hunter mode
Do a bike race
Do a drone race
Do a sailboat race
Use the "Call the cops" hack on the donut-disguised man in Haight-Ashbury
Travel 200 meters on top of a car by hacking it
Escape a Level 5 felony
Collect all the Key Data hidden in the world
Trigger the hack of the century
Finish Operation: Robot Wars
Finish Operation: Power to the Sheeple
Finish Operation: Shanghaied
Finish Operation: Hack teh World
Finish Operation: Eye for An Eye
Finish Operation: W4tched
Finish Operation: $911
Successfully complete an online Co-op Operation
Finish Operation: Hacker War
Finish Operation: Limp Nudle
Finish Operation: Looking Glass
Finish Operation: Haum Sweet Haum
Do a 140 meters long jump while driving a vehicle
Drive 4 km in the world while driving the Merengue from Elek Motors
Hijack a boat
Take a picture of someone vomiting
Get photobombed in a selfie
Finish Operation: Ubistolen
Ride a cable car
Hijack a bus
Finish Operation: Shadow
Finish Operation: False Profits
Pet 10 dogs
Get all the eKart upgrades
Do a stealth takedown on 30 enemies
Hack a robot
Buy a shirt in the Nudle vending machine
Buy the Gatorfeet Whine Country footwear
Buy a two handed weapon at the 3D printer
Finish Operation: Cyber Driver
Make 3 jumps in a row aboard a vehicle
Drive one of the Unique Vehicles
Buy some pants after the party
Buy all the apps in the App Shop
Erase your past identity in the Blume servers
Successfully neutralize 5 fugitives in Bounty Hunter
Take 25 ScoutX location pictures
Finish Operation: Off the Hook
Finish Operation: Caustic Progress
Finish Operation: Bad Medicine
Finish Operation: Automata
Reach the maximum win streak bonus in Showd0wn
Finish Operation: Moscow Gambit