Here is the full list of all 9 ALONE achievements.
Completed ending 1.
Completed ending 2.
Completed ending 3.
Completed ending 4.
Checked all endings. (Including hidden ending)
Killed for the first time.
With the gas stove turned on, the ending has been completed.
After researching the toilet, bathtub, sink, and washing machine, You got the "energy bar".
Until the first call was answered, the lights were not turned on.