Here is the full list of all 15 Hard Times at Sequoia State Park achievements.
Unlocked Celeste
Unlocked Sara
Complete All Mutual Scenes
Complete All Path Scenes
Dreaming of Sara
Play the Story a Third Time
Complete All Dominant Scenes
Play the Story a Second Time
unlock Alice
Dreaming of Celeste
Complete All Passive Scenes
Play the Story for the First Time
Picture with Becky
Deal with the Pest
Dreaming of Becky