I enjoyed this, but it seems gog has just given up on being 'old stuff' exclusively with a vengeance. This game will strain even a modern pc.
It's $9.99 so I guess that's consistent. 'Just sayin', although I'd Welcome more newish and DRM free content on gog, but the 2 price point thing and no DRM rules probably scare many publishers off.
Note: I quite like Cryostasis its well checkpoints well enough that the annoyances are easily ignored and the atmosphere is probably even better than stalker.