Well... there is not many games tbh:
Adastra - released + you have played it
The Smoke Room - Echo's prequel + in development, great game but there is a lot of sex scenes, like... a LOT. Despite that I would recomend it to you, it expands and explains a few Echo events, also game is not yet in a place where it would rapes emotionally someone so it would be smart to play it first.
Khemia / Interea - Adastra sequel / Amicus's honeymoon + both in development. If you haven't check them out then you know what to do:)
Arches - Echo's sequel + in development. Tbh, if you are REALY willing to try Echo and you are not sure if you are ready then you could play this game, it is very emotional, also scary, but it won't change your head like Echo would. I mean this game is just frigin sad, when Echo literally affect you
(it all sounds scary and I know that, I am fragile too and i didn't give a s*** about creators note up there about how this game is emotionall and I ended up ... well ... Im trying to be better person... because of game... lil phatetic of me. Im writting this directly to you, because it is obvious that on everyone it affect diferently, but if you are sensitive then I m gonna say that this's one of those games where creators are not kidding about how strong game is)
PS: sry for my English (its not my language), I hope all of this makes sense :)