Devsisters 'Cookie Run: Tower of Adventure' promotional image in Japan./Courtesy of Devsisters

Devsisters announced that its development studio Oven Games has begun the mobile closed beta test (CBT) on the 21st ahead of the official launch of the cooperative action game 'Cookie Run: Tower of Adventure' in Japan.

Devsisters has signed a publishing agreement with the famous game company Yostar for the Japanese release of 'Cookie Run: Tower of Adventure.' It started local pre-registration on the 15th of last month.

The CBT will run for 11 days until March 3. Players will be able to experience key content such as story mode, RAY mode, glass maze, and tower rifts in advance.

Users who apply for the CBT and participate in the survey after the test will be entered into a raffle to receive Apple AirPods 4 and Amazon gift certificates.