Map : Arc

Map : Mine

Map : Bridge

Map : Bridge

Map : Glade

Map : Yogscave

Map : Arc

Map : Mine

Map : Glade

Map : Glade


On Glade, you'll first need to reach wave 14.

Now, during the build phase, make your way to the right side of the field and jump down one of the square holes. If the prerequisite has been fulfilled a hatch here should open up (slowly). Jumping down will teleport you to a secret area. Once you've reached the end (requires some jumping), the achievement will be unlocked.

Map : Facility


On the map Facility, make your way through until you reach wave 20.

At this point during the build phase head to the core and face the enemies spawn. From here go left to the spire-like tower and head up the stairs. Jump down to the end of the tunnel and jump at the door. It will open and once you walk inside you will unlock the achievement.

Map : Aftermath

Map : Invasion

Map : Chasm