A disclaimer: it's extremely difficult to talk about Her Story without using spoilers. Almost impossible in fact, but I'm going to try.
So if you've come in here and you haven't played Her Story, be wary, but feel relatively safe. I'm gonna keep this simple and keep as spoiler free as possible.
Her Story is somewhat of an investigation game. It's a game about searching video footage, finding key words and piecing together a strangely compelling murder mystery. It's also much more than that.
It's a game that's constantly surprising you. Constantly pulling the rug out from underneath you. Constantly redefining what's going on. Constantly toying with your expectations.
Her Story is unique. It's played from an interesting perspective. The idea being that you're sitting at a computer (an old one with a custom OS) and navigating that in order to investigate old video footage and put it all together. The fiction doesn't quite hang together perfectly, but that vibe? That feeling? It's dense and tangible. It's a game about using a computer to solve a mystery and as you sit there at your own computer you are drawn into this world. Her Story is 'immersive'.
And it's all extremely well put together. The writing is (for the most part) believable. The central performance is about as good as could be expected. The production values feel a little low, but for the most part that makes it work.
I thoroughly recommend it. I haven't finished playing through yet, but I'm enjoying every second of this unique, interactive experience.