Here is the full list of all 69 GACHIMUCHI Arcade: Lustful Boys achievements.
You have completed Xonix mode
You have completed the sixth level of the xonix
You have completed the fifth level of the xonix
You have completed the fourth level of the xonix
You have completed the sixth level of the pong
You have completed Pong mode
You have completed the fifth level of the pong
Click on a special place
You have completed the fourth level of the pong
You have completed the third level of the pong
Really
Click on the neon title
You have completed the third level of the xonix
You have completed the second level of the xonix
You have completed the first level of the xonix
You have completed the second level of the pong
You have completed the first level of the pong
You have completed the sixth level of the arkanoid
You have completed Arkanoid mode
Lose for the first time
You have completed the fifth level of the arkanoid
You have completed the fourth level of the arkanoid
You have completed the third level of the arkanoid
You have completed the second level of the arkanoid
You have completed the first level of the arkanoid
You have completed the sixth level of the puzzle
You have completed Puzzle mode
You have completed the fifth level of the puzzle
You have completed the fourth level of the puzzle
You have completed the third level of the puzzle
You have completed the second level of the puzzle
You have completed the first level of the puzzle
Win for the first time
Click on Billy
♂ Dancin' when I think of you ♂
Click on the guide button
Click on the restart button
Press the back button
♂♂♂
Click on the play button
Changing the language of the game
That's good
Can not hear anything
You were able to wait until the end of the credits.
Enter the credits of the game for the first time
Exit the game
Enter the gallery for the first time
See the loading screen for the first time
Welcome to the game
You have completed all levels
You have completed the first level of the snake
You have completed the second level of the snake
You have completed the third level of the snake
You have completed the fourth level of the snake
You have completed the fifth level of the snake
You have completed the sixth level of the snake
You have completed Snake mode
Collect your first apple in a snake mode