I haven't had a chance to try the Linux version or recompile it myself, but running on a "mere" AMD A4, with 8 GB and windows 8 (nearly full solid state drive, this is my portable, after all) this game runs gorgeously in 1600x900 with everything maxed out. (This is directly in response to the user (uoowoo) who gave it one star... angry review written by someone who reminds me of my demented father calling any music except gypsy polka... "noise.") Also, any user bitching this way is entirely unfit to be logging onto the internet, since any cursory reading of GOG's policy tells you they will refund your cash if you are unhappy with a purchase.
That said, I concur with the 5 star users. The game is breathtaking on an actual high end system, but pretty damn gorgeous even on my portable, which hasn't been high end since the first A6's came out (the second and third gen A10's are out now.)
The dialogue does indeed sound childish, but that is because we're seeing the world through the eyes of a creature which, for all we know, is the survivor of the apocalypse, largely innocent, and... alone. Also, the creature in question is some sort of naiad/nereid (not little mermaid, sorry uoowoo, you got Disney on the brain.)
I will include no spoilers except to say the game is indeed corgeous, and pretty difficult for the typical kill everything right now player. In true metroidvania fashion, there will be places where you'll literally try to exploit what you think are bugs, and fail, or succeed, only to realize you should have come back later with the right form. Occasionally you'll miss a boss entrance for optional bosses. There are tough as hell to reach places, etc.
This and Dust are probably some of the most gorgeous cell shaded/hand drawn style games I've seen to date. Both also have excellent soundtracks.
If there's one thing I'd suggest to GOG, its... This game needs its soundtrack extracted in FLAC and MP3. Seriously.
