Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Arena God	Reach wave 40 in an endless arena.
Arena Hero	Reach wave 10 in an endless arena.
Arena Master	Reach wave 20 in an endless arena.
Boss Stomp	Defeat the Wrecker Campaign Completed!
Comeuppance	Strange Alliances Campaign Completed!
Dimensional Diplomat	Level up 30 Echoes to Veterans.
Dimensional Maven	Level up 60 Echoes to Veterans.
End of the Line	Locate Emptiness Campaign Completed!