Dragon Ball Z: Dokkan Battle

Dragon Ball Z: Dokkan Battle (ドラゴンボールZ ドッカンバトル) is a free-to-play mobile game based on the Dragon Ball anime franchise. Developed by Akatsuki and published by Bandai Namco Entertainment, it was released in Japan for Android on January 30, 2015 and for iOS on February 19, 2015. Dokkan Battle was eventually released worldwide for iOS and Android on July 16, 2015. The game has exceeded 350million downloads worldwide, and has grossed over US$3 billion in worldwide revenue.

Gameplay
The game includes elements of board game, collectible card game, and puzzle genres. The main game is made up of levels that work similarly to board games, with spots dedicated to items, power-ups, traps, and fights. During the fights, the player's characters fight with an enemy via a puzzle system similar to match-3 games. Multiple orbs of different colors are placed between the player's character and the enemy, and the player can match different kinds of orbs to do attacks or use other abilities. After a certain amount of orb matches, the player unlocks "Dokkan Mode" for one of their characters, which requires them to tap 7 targets in a Z-shaped configuration as a ki orb passes over them. This allows that character to unleash a super attack that is much more powerful than the typical super attack.

Development and release
DualShockers had an interview with the game's producer Toshitaka Tachibana in July 2017, discussing the development and release of the game.

Reception
The game reached 15 million downloads within three months when it was released in Japan. The game reached 100million downloads worldwide in November 2016. In April 2017, it topped the iPhone gross revenue chart in the United States, where it had close to 1.5million downloads and grossed more than US$26 million from nearly $18 average revenue per user. By July 2017, the game had released in 50countries, reaching number1 on the App Store in 16countries, reaching 200million downloads worldwide. By August 2018, the game had exceeded 250million downloads worldwide. As of August 2019, the game has exceeded 300million downloads worldwide. As of August 2021, the game has exceeded 350 million downloads worldwide.

In Japan, the game grossed at least ¥billion (US$million) between 2017 and 2018, including ¥27.8 billion between January 2017 and October 3, 2017 (the year's fifth top-grossing mobile game), and ¥46.1 billion in 2018 (again the year's fifth top-grossing mobile game). In China, the game grossed ¥2.8 billion (US$million) in 2017. In the United States, the Google Play version grossed US$6.18 million in November 2017, and was the month's seventh top-grossing Play Store app. By July 2018, the game had amassed over US$1 billion in worldwide revenue, including approximately US$400 million from outside of Japan, and about US$200 million in the United States. By November 2019, the game had grossed over US$2 billion worldwide. , the game has grossed over US$3 billion worldwide.

Gacha scandal
On November 14, 2017, a new character Kefla (ケフラ) was advertised to be added into the gacha (loot box) pool, but only a few players were able to draw her successfully. The majority failed to spot Kefla's presence in the list of possible loot drops. This led to suspicion that the developer had intentionally manipulated Kefla’s drop rate, so most players would pour a lot of money into the game in an attempt to draw her in vain, while maintaining the illusion that she was still in the drop pool. Soon after the rumor went public, the developer halted the gacha function and denied user access to the list of gacha drops temporarily, explaining that the issue was an unintentional mistake. They then gave 300 Dragon Stones to all players on the Japanese servers.