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PUZZLE STAR BT21 is a puzzle game developed by LINE Friends Corporation of BT21 characters. This game was launched on Apple Store and Google Play on April 3, 2018.

On August 28, 2023, the game announced that will be ending its service on October 16, 2023.

LINE Friends PUZZLE STAR BT21 hits 1 million downloads in just 2 days after its release![]

On April 5, 2018, it was announced that the game had reached 1 million downloads.[1]

PUZZLE STAR BT21, the first block & action puzzle game in the world released by LINE Friends, a global character brand, reached a total of 1 million downloads worldwide just 2 days after its release, and was placed 1st in the free popular games in App Store for Korea, Japan, Singapore, Thailand, and Indonesia.

PUZZLE STAR BT21 successfully captivates players with its cute space stars, the BT21 characters, a fun gameplay style that involves drawing specific blocks to clear the stage, and a unique story in which the characters embark on a quest for a legendary song that will help them become stars.

The game also provides a total of 91 costumes for the BT21 characters, which gives players strong motivation for collecting; it also provides an easy and fun playing environment where players can use several different items, which has expanded their player-base from their previous character fans to a broader age range. As the game’s popularity grows, it’s not hard to find a bunch of reviews like ‘I lost track of time playing PUZZLE STAR BT21,’ or ‘BT21 characters are so cute,’ spread all across social media.PUZZLE STAR BT 21 has 10 episodes, 170 stages currently released, and will be adding more new maps and stories through regular updates. They will also be releasing new character collections with a variety of unique costumes, so PUZZLE STAR BT21 is expected have an active and engaged play-base for quite some time. PUZZLE STAR BT21 is serviced worldwide including places like Korea, Japan, and the US, (though there are exceptions for certain countries) and can be downloaded via the App Store and Google Play.


The gameplay style involves drawing specific blocks to clear the different stages, collect more than ten different versions of each character, and a unique story in which the characters embark on a quest for a legendary song that will help them become stars.


# Name Stages Release
1 Class Room 1-17 April 3, 2018
2 Hideout on the Roof 18-34
3 Terrace Café 35-51
4 BT21 Practice Room 52-68
5 Train Station Platform 69-85
6 Park 86-102
7 Convenience Store 103-119
8 BT Singing Room 120-136
9 Bus Stop 137-153
10 White Snow Path 154-170
11 Cherry Blossom Path 171-187 April 20, 2018
12 Green Mountain 188-204 May 10, 2018
13 Seashore 205-221 June 1, 2018
14 Beachside Restaurant 222-238 ?
15 Amusement Park 239-255 ?
16 Haunted House 256-272 July 14, 2018
17 Sunset Park 273-289 ?
18 Raining Street 290-306 ?
19 Hot Spring 307-323 ?
20 Ski Resort 324-340 August 28, 2018
21 "Shinjuku" Station 341-357 September 11, 2018
22 "Nanba" Street 358-374 ?
23 "Hongik Uni." Street 375-391 ?
24 "Yeosu" Night Sea 392-408 ?



Official Links[]