I started Stardew Valley during a genuinely rough patch, and it quietly turned into one of my most-played games of all time.
Stardew Valley gameplay: a well-kept farm with rows of crops, a red-roofed barn, free-range chickens and a cabin
It does not so much reinvent the farming sim as lovingly refine every single part of it, from crop planning to fishing to slowly befriending an entire town of well-written characters. There is always one more thing to do tomorrow, and that gentle, low-stakes loop is enormously comforting at the end of a long day. The seasonal festivals and the way the whole valley shifts with the calendar give it a real sense of place and rhythm.
Stardew Valley gameplay: the summer Luau festival on the beach, townsfolk gathered around a long table as the Governor speaks
Underneath the cosiness there is a surprising amount of depth in the mines, the community centre bundles and the late-game min-maxing for anyone who wants it. Multiplayer is still a little rough around the edges, with the occasional desync and some awkward shared-progress quirks. Solo, though, it is just about perfect, and it is staggering that one person built all of this.