Games rarely have such a strong emotional effect on me, but sounds like Rakuen might be right up your alley. Silence also has its moments. Maybe Gone Home, if you don't mind a so-called walking sim?

Well, from my own highly subjective experience:

• SOMA, from Frictional Games (with the "Safe Mod" if your not in "psychological horror"): the game makes me actually cry more than one time, even when playing it again (the discussion in the climber! .__.), for me it's just the best emotional gaming experience I ever had!


• That Dragon, Cancer, from Numinous Games: highly experimental gaming experience from my point of view, not the most heartbreaking game for me (it's probably cultural) but a very personal game by its creators


• The First Tree, from David Wehle: I'm mixed on the game's technical side, but it doesn't failed to deliver some emotions (very personal game from its developper too)!

:)

I don't recall for sure whether any video game has really managed to pull tears from me besides The Last of Us's prologue, but I know Daedalic's Chains of Satinav and Memoria had very bittersweet endings that left a strong impression on me. They both work with Proton according to ProtonDB, but the latter is missing sound in cutscenes apparently =/

I'm pretty sure I'm forgetting something, though :><:

The three games that gave me such emotions are :

- Valiant hearts.
- Brothers - A tale of two sons.
- Old man's journey.