I recently again played Woodruff and the Schnibble of Azimuth; old but a classic (realized on ScummVM, but the original CD from back in the 90s)... I also enjoyed The Invincible and Prey... two other really good games. You may discuss if Invincible really is a game or more of a walking simulator and Prey I find one of the most underrated games at all. Firmament by Cyan, Syberia, Samorost 3, SOMA, Machinarium, Chuchel (not for everyone surely), The Signifier, Gorogoa, ...
Maybe try Until then if you are seeking a heavy story that will make you depressed for a looong time XD