Complete a certain challenge.
Reach the end.
Activate the Treehouse laser.
Activate the Quarry laser.
Activate the Jungle laser.
Activate the Bunker laser.
Activate the Marsh laser.
Activate the Town laser.
Activate the Monastery laser.
Activate the Keep laser.
Activate the Shady Trees laser.
Activate the Desert Ruin laser.
Activate the Symmetry laser.