Here is the full list of all 21 Our Journeys A Collection of Visual Novels achievements.
Zombie Jack Ending (Miller’s Blood)
Super Between Ending (Miller’s Blood)
Alive to the End Ending (Miller’s Blood)
Get the third Deadly End (Miller’s Blood)
Get the first Deadly End (Miller’s Blood)
Get the second Deadly End (Miller’s Blood)
Rift Breaker Path End (I’m a Barrier)
Normal Life Path End (I’m a Barrier)
Beginning Path (I’m a Barrier)
Get the Good Ending (The Four Alice)
Get the second Bad End (The Four Alice)
Get the third Bad End (The Four Alice)
Get the first Bad End (The Four Alice)
Get the Alternate Ending (Lorange and the Domain)
Get the True Ending (Lorange and the Domain)
Get the fourth Game Over End (Lorange and the Domain)
Get the third Game Over End (Lorange and the Domain)
Get the second Game Over End (Lorange and the Domain)
Get the fifth Game Over End (Lorange and the Domain)
Get the first Game Over End (Lorange and the Domain)
The controls (Lorange and the Domain)