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