Here is the full list of all 12 Always The Same Blue Sky... achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Alienate yourself from Kira as much as possible
Endear yourself to Kira as much as possible
Travel to an undiscovered land
Reach ending 1
Reach ending 2
Demonstrate a firm scientific grasp
Visit the ancient courtyard
Try 2 different milkshakes
Take note of your surroundings
Captivated by what could be...
A burning fire
A calming glow