FIST does STALKER.
This is one of those cool games where the game and the adventure are the same, where the PCs are set up to go on one specific job--if you wanted more of this sort of thing in a more open, gamey structure, within FIST's existing milieu, there's a Zone Generator in the corebook, you'll be good. This game benefits from a high degree of specificity and a new, different, darker tone. The style of it is plain and stark--or unsubtle or aggressive or something. No art, plain black text on white. An ideal look for the game in my opinion. Conversational tone and natural language conveys both the tone and the intent of the game design excellently. It's even got me writing this review kinda tersely after reading it!
The GM advice in it is very keyed towards directing discussion and engaging with the party--there are no NPCs and nothing to fight. You're traversing dangerous and sometimes beautiful wilderness. This is super weird as a game, but if you've got one of those tables that's a "writer's room" this's going to really do it for you I'm sure. Not for everyone, but VERY good for the people it is for. Read this entry.