Here is the full list of all 42 COME INSIDE MY INNER WORLD achievements.
Beat the game and delete the save in settings
Enjoy all visual in gallery
Get a billion hearts
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Enter the ingame statistic page
Visit the gallery
Reach the final in free mode
Buy up all the bonuses
Meet the streamer girl
Buy the bonus of every type
Meet the outdoor girl
Meet the loving pair
Get ten million hearts
Meet the maid
Buy 42 bonuses
Get five million hearts
100,000 hearts received through waiting
Get a million hearts
Meet the fitness girl
Get half a million hearts
10,000 hearts received through waiting
Get one hundred thousand hearts
Meet the top-down girl
Get fifty thousand hearts
Spend 31337 hearts
Meet the spiritual girl
1,000 hearts received through waiting
Click the girl one thousand times
Get 10,000 hearts
Get five thousand hearts
Fully upgrade one bonus
Meet the relaxed girl
Spend 1337 hearts
Get one thousand hearts
Spend 420 hearts
Meet the ghost!
Get five hundred hearts
Spend 69 hearts
Make your first bonus purchase
Get one hundred hearts
Win the first heart
Start the game