Full list of all 41 The Bureau: XCOM Declassified achievements. It takes around 25-30 hours to unlock all of the achievements in the base game on Windows.
The base game contains 34 achievements, and there is 1 DLC pack containing 7 achievements.
Complete the first trial in Hangar 01
Trigger the Invasion in Hangar 6
Defeat the Hangar 6 R&D Invaders
Destroy 60 enemies with DaSilva's Demo Charges within a single Hangar 6 R&D campaign
Beat Hangar 6 R&D without firing any alien weapons
Take a level 5 agent of every class into the field within a single Hangar 6 R&D campaign
Complete DaSilva's perk tree without choosing Lift, Drone, or Mind Control