I want to join my voice with those who bought the game as a way to support DRM-Free games, the game is a good time, love the main character and the setting, I really hope developers keep cultivating and making something more out of this interesting fantasy setting, can't wait to revisit Aloy's world, I already own the disk base game on PS4 and was waiting on some "me time" to buy and play the expansion (which is included here), made me happy to find it at GOG, Here is hoping more developers join the DRM-free club and we as gamers keep supporting DRM-Free titles and physical game disks, one more thing, I always wait in DRM-free's over anything, anywhere else, I'm glad i didn't buy the expansion on console.
Thanks Guerrilla and PS mobile for teaming up with GOG, and keep up the good fight GOG.