I was not expecting when I went into this gay furry visual novel that I would come out of it so deeply moved. It's good. It's really good. Like, now-in-my-top-5-favorite-visual-novels-of-all-time good.
It's astonishingly effective as a work of psychological horror and, ironically, so very human in the raw vulnerability of how it presents its characters and ideas. TJ's route in particular is one of the most viscerally uncomfortable things I have ever experienced in my life, and it creates that horror in a manner that only a video game could and there is no way I am going to spoil it here (though if you want my advice, don't play TJ's route first, start with Carl or Leo's).
The fact that there's only one proper in-depth analysis of this game that I can find on Youtube is a crime. There are so many layers to Echo's narrative, so many powerful thematic throughlines; it's the kind of story that just begs to have numerous video essays made about it. Hell, if I ever get into the video essay thing I will absolutely do one myself.
Echo is a game that looked me straight in the eye and didn't even blink as it reached deep and tore my soul to shreds, then rearranged the pieces to make something new. Even several days after finishing all five routes, I keep reflecting on it and making new connections, finding new things to appreciate, from the bittersweet optimism of Leo's ending to the terrifying grounded horror of TJ's route to the bleak irony of Flynn's fate. Echo is affecting, it's brutal, it's beautiful, it's art. I don't know what else to call it.
If you have any interest in horror and you like or are at least willing to put up with a little bit of NSFW furry shit, please play Echo. It is absolutely worth your time and it deserves so much more attention than that of the niche audience it currently has (just, you know, be aware that the NSFW furry shit exists here). This is a game that I'm going to be thinking about for a very long time.
One last thing: I highly recommend saving Jenna's route for last. It does an admirable job tying everything together at the end in a satisfying way, and especially if you started with the prequel game Route 65 it brings everything subtly full-circle to put the core themes of the game into sharp relief).

Here's a link to the game: https://echoproject.itch.io/echo
And here's the short prequel/prologue set seven years earlier, which I do highly recommend playing first: https://echoproject.itch.io/echo-route-65
They're both free, so go nuts.

Once again am drawing my wolfgirl, Koran :3