[Young-soo Moon Young-soo] 'Unpaid' game, which excludes paid products and payment systems, is noteworthy. It is a structure that generates sales only with advertisements in the game. Entrance (CEO Kim Byung-soo) announced on the 15th that it has started a pre-booking of the mobile game 'DK Mobile: Dorijin'. DK Mobile: The Dorizine is the second DK mobile series, which was released in 2021 and ranked 5th in Google Play, followed by 'DK Mobile: Return of Heroes'. The company explains that DK Mobile, the first game, continues the service of the return of heroes, and continues the DK Mobile: Dorijin service. In particular, this game was introduced for the first time among domestic MMORPGs. This means that there are no paid products and payment systems in the game. In addition, the company plans to implement the season system to provide all users with equal opportunities and pleasant game environments. Revenue is a structure that is only uploaded by advertising...