The Version 1.1 Title update for Element TD 2 - Multiplayer Tower Defense has 7 achievements.
Clear Wave 55 on Normal Difficulty
Clear Wave 55 on Hard Difficulty
Clear Wave 55 on Very Hard Difficulty
Clear Wave 55 on Insane Difficulty
Get a Boss Score of at least 500
Get a Boss Score of at least 2000
Get a Boss Score of at least 5000