Vanquish
50 Achievements
15-20h
That Ended Up Working Out Nicely
After taking control of the enemy transport in Act 2-2, do not let a single enemy escape.
41.4%
How to unlock the That Ended Up Working Out Nicely achievement in Vanquish - Definitive Guide
Only on Act 2-2: Rapids
On Act 2-2 (Rapids), for the first time you'll be on a vessel with multiple wagons. After shooting a bunch of robot enemies on another identical vehicle, the one you're on will get stuck after a while. Once stuck, you'll have to take care of another set of robot enemies located in and on buildings. At some point, Elena will tell you that enemy ships are dropping in.
Continue fighting like you did before, until you have to catch up with one of the enemy ships, engaging a QTE. If you do exactly as prompted on screen, you'll get a cutscene where Sam kicks a red enemy robot off the ship and you take control of it. This ship has 4 turrets, one on each corner of the ship, but you cannot use these. In fact, Elena will take control of them. All you'll have to do, is aim using your and shoot using (not as with the regular weapons!)
Another enemy vessel, similar to the one you were on before, will catch up. In order to get the achievement, you'll have to kill all the enemies on that vessel as fast as possible.