This is definitely an interesting story to follow. I feel like after playing Echo, I already know how it's going to end, and yet I'm compelled to play through it anyway. I sincerely hope I'm wrong though. Spoilers ahead I guess, for this, Echo and Adastra.
Regardless, I've enjoyed what I've played so far. I liked the Adastra reference in Cliff's route, and the coded message in Murdoch's route is extremely unnerving, especially as it's strongly implied his sister left it for us to find. What does she want us to find in the basement? While I do like Nik as a character and feel he's probably the best fit for Sam chemistry-wise, I feel like William's is the route to go. Honesty has never backfired before, right?
I feel (though it may not even be set in the same universe), Echo the town is a focal point for the Other, as named in Adastra. The antithesis to life and everything natural, Amicus said it could make you see things that weren't there (which Echo has done) and both Chase and Samuel have described Echo as being something intensely unnatural, something that invokes a response on an instinctual level. I'm probably just reading too much into things though.