Lone Survivor: The Director's Cut is a post-apocalyptic survival horror game where the player controls an unnamed, masked survivor (referred to simply as "You") who must wrestle with both the mutant horrors that roam the city and his deteriorating mental state.
Lone Survivor bears many similarities to the Silent Hill series, with many likening it to a 16-bit SNES Silent Hill game. One of the most prominent features that Lone Survivor shares with the Silent Hill series are its multiple endings. As the player explores the surrounding area, they'll encounter various NPCs and objects that they'll be able to interact with, and how the player chooses to carry themselves in the post-apocalyptic world determines which ending they'll get.
There aren't many indie survival-horror games on the market, but if that's what you're looking for, then you're in luck: Lone Survivor is a fantastic instance of that niche.