Here is the full list of all 36 Projekt: Passion - Season 1 achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Finished the game
Flirt three times with Ashe
Finish part 6
Make 75 friendly choices
Win Elysra's question game
Flirt three times with Elysra
Finish part 5
Flirt three times with Emily
Flirt once with Ashe
Finish part 3
Flirt three times with Kaylee
Flirt once with Emily
Flirt once with Elysra
Make 50 friendly choices
Finish part 2
Flirt once with Vesnia
Finish part 1
Flirt once with SAndrA
Make 25 friendly choices
Flirt once with Kaylee
Make a dialogue choice
Make 25 witty choices
Make 50 witty choices
Make 75 witty choices
Make 25 aggressive choices
Make 50 aggressive choices
Make 75 aggressive choices
Find all deaths in part 1
Find all deaths in part 2
Find all deaths in part 3
Die on Tollorix
Die on Corth
Die by interrogation
Die twice on Aeon Station
Finish part 4
Unlock all codex entries