Here is the full list of all 50 Vanquish achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Complete all of the Tactical Challenges in VANQUISH.
Destroy a Romanov's arms and legs, then finish it with a melee attack.
Complete all Acts on Hard difficulty or above.
Complete Act 5 on Hard difficulty or above.
Complete Act 4 on Hard difficulty or above.
Complete Act 3 on Hard difficulty or above.
Complete Act 2 on Hard difficulty or above.
Complete Act 1 on Hard difficulty or above.
Find and fire upon all of the Pangloss statues hidden on the colony.
Complete the game without dying, regardless of difficulty level.
Destroy two Romanovs in a row using only melee attacks.
Destroy 100 enemy robots with melee attacks.
Complete all Acts.
Complete Act 5.
Destroy the Buzzard without allowing it to reach ground level in Act 5-1.
Complete Act 4.
Ignore the elevator start order in Act 4-1. Instead, hold position and destroy all reinforcements.
Complete Act 3.
Destroy five or more enemy transports from atop the Kreon in Act 3-7.
Destroy 10 enemies distracted by cigarettes during one mission.
Destroy two enemy robots who have been distracted by a cigarette.
Do not allow any friendly armor to be destroyed during Act 3-5.
Proceed on the monorail in Act 3-4 without being spotted by the enemy troops or searchlights.
Destroy all the floating turrets in Act 3-4.
Destroy two cannons in Act 3-3 and complete the mission.
Defend the Pangloss statue in Act 3-2.
Destroy a Romanov with a melee attack.
Complete Act 2.
Destroy four enemies simultaneously with the Lock-on Laser.
Destroy ten enemy robots that have been disabled with an EMP emitter.
Destroy two Argus robots in Act 2-3 while they are in bipedal mode.
Destroy the arms, head, and back of an KNRB-0 Argus robot.
Revive 20 friendly troops.
Level a weapon up to maximum operational capability.
After taking control of the enemy transport in Act 2-2, do not let a single enemy escape.
Destroy ten incoming missiles or grenades.
Destroy two or more enemy robots at once with the LFE gun.
Destroy a Chicane with a hand grenade.
Complete Act 1.
Destroy ten enemy robots with melee attacks.
Destroy three enemy robots at once with rocket launcher splash damage.
Scan and acquire all weapons.
Destroy an incoming missile or grenade.
Destroy three enemy robots while in damage-triggered AR Mode.
Manually trigger AR Mode and destroy three enemy robots in a row.
Manually trigger AR Mode and destroy an enemy robot.
Destroy three enemy robots at once with one hand grenade.
Revive a friendly troop.
Maintain a Boost dash to the limit of the ARS reactor without overheating.
Complete all DARPA training exercises.