A full version program for iPhone, by Kakao Games Corp..
Hello BT21 is an arcade game that allows you to play your favorite line from the popular Friend group, which is loved by millions of people around the world.
The game consists of many stages that will allow you to play your way through the storyline, as well as many challenges.
The main goal is to clear the stage, but you will have to face many obstacles and enemies along the way.
You will be able to clear the stages by destroying all the enemies, but in order to do so, you will need to defeat them using your powers.
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