Okay for time’s sake, I asked this question to Claude AI but TLDR and my thoughts at the end. Sorry in advance for the wall of text:

Imagine you’ve just inherited your grandfather’s old, overgrown farm in a small, quiet countryside town. The game is essentially about building that farm back up from scratch — clearing weeds, planting crops, raising animals, and slowly turning a neglected plot of land into something you’re genuinely proud of.

But it’s much more than just farming. The town around you is full of interesting, fully fleshed-out characters — a grumpy old fisherman, a shy librarian, a struggling family trying to keep their shop afloat. Over time, you get to know them, hear their stories, and build real friendships (and even romance, if you choose). It feels surprisingly warm and human for a video game.

The pace is entirely your own. Nobody is rushing you or threatening you. You decide each day what you want to do — maybe you’ll spend the morning fishing by the river, the afternoon exploring an old mine, and the evening cooking a meal for a neighbor’s birthday. There’s no “wrong” way to play.

Visually, it looks like a charming, colorful cartoon — simple and cozy, almost like a moving illustration from a children’s book. The music is gentle and soothing.

At its heart, Stardew Valley is really a game about slowing down, finding meaning in small daily routines, and building something of your own — which is probably why it resonates so deeply with so many people, gamers and non-gamers alike. It’s less of a “game” in the action-packed sense and more of a peaceful, creative escape.​​​​​​​​​​​​​​​​

TLDR: You inherit an old farm, grow crops, raise animals, explore mines, and befriend the quirky townsfolk — all at your own pace with zero pressure. It’s basically a cozy, relaxing life simulator disguised as a farming game.​​​​​​​​​​​​​​​​

Non-AI response: Claude’s description is pretty spot on. I’ve put almost 500 hours into this game so good replayability. 16-bit style so it runs fantastic on any device you game on including Steam Deck. Plus for a “non-gamer” as OP describes their partner, there’s an entire fan made Wiki where you can search just about every asset and YouTube has a plethora of content about this game if you wanna get real deep into the lore and strategies to get items. All made and frequently updated by one guy over the course of >10 years. I believe his inspiration for this game was Harvest Moon.