"冒険の書は消えました" is a free RPG game developed by G.Gear.inc for the Android platform. In this game, the protagonist finds that their own adventure book has disappeared and decides to steal the adventure book of another hero to make their own adventures easier.

This game is perfect for killing time and features retro pixel art graphics. Players can train and strengthen their protagonist through battles and there are also idle elements, allowing players to progress at their own pace.

The game consists of the following steps:

1. Battle against different heroes.

2. Game over (progressing when the protagonist defeats a hero and steals their adventure book).

3. Start a new game from level 1 and become even stronger.

As the protagonist loses battles, they become stronger with an indomitable spirit. Steal the adventure books of other heroes and progress through the RPG with ease.

In the town, players can battle heroes that match their level. The flow of victory and game over is as follows:

• Winning a battle allows the player to steal the adventure book (the level of the defeated hero).
• Game over resets the protagonist's level to 1.

Additionally, players can read manga when they visit new locations.

In battles, players can attack by tapping the "fight" button. They can also unleash a powerful special move called "Awakening" by accumulating power through rapid tapping. Players can store up to 5 awakenings and one awakening recovers every 15 minutes.

Experience the loop-style development RPG where the more you lose, the stronger you become. This free RPG game with retro pixel art is perfect for killing time during your commute or school breaks. Can the protagonist clear the game? Play to find out!