Here is the full list of all 33 Double achievements.
Don't uncover Lucia's lies
Do not help Louis in the shootout
Get good ending
Answer right all questions about dreams
Complete the game without upgrades
Get bad ending
30 headshots
Open all letters in dreams
Кill 40 enemies with dash
Complete day 9
Kill 15 frozen enemies
Answer wrong all questions about dreams
Take 4 pills
Complete day 8
Kill 15 enemies using focus
Die of glitch
Complete day 7
Explore all things at the hospital
Complete day 6
Complete day 5
Kill 30 enemies by shooting from cover
Hide pills 5 times
Skip 10 dialogs
Complete day 4
Complete day 3
Uncover Lucia's lies
Complete day 2
Trust Louis
Kill 15 without aiming
Complete day 1
Answer right all questions about dreams in day 1
Die from waiting
Kill an enemy with a dash while having a minimum of lucidness