Which map has the most lockers to open?

[DeadlyKitten]

Doing it for the new nightwave.

[MekaDovah]

Try a Corpus planet tileset mission, like E Gate. They tend to have rooms with a bunch of lockers in a row.

[JebKerman]

It definitely was Jupiter before it's tileset got updated. However 20 lockers is really not that much, you should be able to do it in one exterminate or capture mission, two tops.

[DeadlyKitten]

Finished it. Thank you !

[lagamemnon]

Master Thief is one fine mod.