What is the one game you think is genuinely underrated compared to how good it actually is

[NoLimitsOscar42]

Some genuinely excellent games never quite get the recognition or sales they deserve, often due to unfortunate release timing against a bigger competing title, a marketing budget that simply could not compete with a major studio's blockbuster release, or a genre or style that happened to be unfashionable at the exact moment the game actually came out, regardless of how well crafted the actual experience turned out to be.

Discovering one of these underrated games years later, often through word of mouth or a random recommendation rather than any major marketing push, can feel like a genuinely exciting personal discovery precisely because so few other people seem to have played it. What is the one game you personally think is significantly underrated relative to its actual quality, and why do you think it never got the recognition it genuinely deserved?