Here is the full list of all 27 Otakus Adventure achievements.
Complete the figure in my room.
Complete the flight game inside the mobile phone without being hurt.
Don't splash outside the toilet when you go to the toilet.
In order to love him, buy his photo album.
Find Michael's secret.
Drink water.
Win the game with a score of 3-0 in arcade hall.
Play all the sleeping games at Bobo's home in one row.
Take a sleeping pill and go to sleep at Bobo's house.
Hit the box in the park 30 times during the shooting game.
Complete all shooting games without being hurt.
Thread a needle in one try.
Perform the operation without making mistakes.
A telescopic gun can be used only once to achieve its goal.
Find an assistant without making mistakes.
Complete all boxing games without being hurt.
Complete the game of space flight without being hurt.
Defeat the first hero when the whole team reaches level 5.
Defeat all bosses in a different world.
Complete your house in a different world.
Don't break the flashlight in Inverted Castle.
Exercise all characters to the extreme in a different world.
Make all endings.
Be with girl No.1.
Be with girl No.2.
After save the arcade hall, be with girl No.3.
Save Waifu and the world