Firewatch is an interactive storytelling experience made by a small development team from San Francisco.
You play as Henry, a man who has dealt with some serious life events and winds up in Yellowstone National Park as a forest fire lookout. Your only acquaintance is Delilah, a faceless supervisor that you converse with over a long-range walkie-talkie.
Firewatch's powerful brand of exposition is unlike many games I've played before, but it's an effective style nonetheless. Where most story-driven games like to give you pivotal choices that affect the outcome of the game, Firewatch tends to navigate away from that kind of mechanic (save for the use of dialogue branches). Instead, the story more or less happens to you as you play, relying heavily on its exceptional writing and superb voice acting.
The game's seamlessness may be its most impressive feat because rarely do you get dragged into drudgery, save for a few backtracking segments. Instead, it's Firewatch's sense of mystique and compelling backstory that carry along its mostly passive experience.