It's not Stalker at all, but that doesn't mean it's a bad game. It is very atmospheric and has some gags typical of horror films. Interesting plot, moderately hardcore gameplay, very dark realistic graphics, excellent sound. There is also some strategic component, namely, you need to distribute resources, supply your team with food and weapons, assemble this very team, send its members on raids for supplies, equip your base with various useful household items or decor.
To some extent, the game is even a little better than STALKER itself.
8.0