Hades has a True Ending — completing ten successful escapes unlocks a final story sequence — but the epilogue continues beyond it. After the True Ending, specific gifting sequences with Zagreus’s family members unlock conversations that extend the story past its resolution: Nyx’s conversation with Chaos, Achilles’s final letter, Hestia’s acknowledgment.
The most significant post-ending conversation is with Zagreus’s father Hades himself. After all prior relationship conversations are exhausted, a final Hades dialogue becomes available that begins in his standard cold register and ends in a single line that the game does not flag as special, does not celebrate, and does not lock behind any achievement.
The line is an acknowledgment of pride. Hades says something to Zagreus that takes the entire game to earn — not a quest completion, not a gift threshold, but the cumulative result of every prior interaction being processed by a character who expresses nothing directly. Supergiant built it to land quietly, as a single sentence in a long conversation, which means players who did not notice it found out from friends who did.

This is exactly why I love this game. So many layers underneath the surface if you just take the time to look.
Stumbled across this on a late-night session and couldn’t believe it. Your explanation finally made it click.