Full list of all 34 Infinity Nikki achievements.
The base game contains 24 achievements, and there is 1 DLC pack containing 10 achievements.
Collect 100 Whimstars in Itzaland
Obtain 3 Bows
Clear the Mothershroom's Dream Trial (Hard)
Clear the Shiny Vault Trial (Hard)
Clear "Shiny Vault"
Clear "Coliseum"
Defeat corrupted Whirls
Complete 12 different stages in "Behemoth Beater"
Collect all sketches of "Providence Immemorial"
Collect "Providence Immemorial" outfit