Whether it's Stephen King's The Mist, John Carpenter's The Fog, or actually having to make your way through the horrible white nightmare that is ground clouds, we can all agree that fog is a scary thing. It makes sense that the most anxiety-inducing game around, PlayerUnknown's Battlegrounds (PUBG), has received an update that puts players in the eternal twilight of low-level condensation.PUBG only has one map, often referred to as Murder Island, and while developer BlueHole is working on new maps to add to the game, right now the variety in the game comes from weather and time of day alterations. Sometimes it's raining when you load in. Other times, it's sunset. And now, occasionally, there is a dense fog that covers everything.The most interesting thing about the fog is how it changes the look of the game. Standing on a hilltop has always been dangerous because of a silhouetting effect that makes you very visible, but figures that are visible during the fog weather are mostly just dark blotches. This means that people are silhouetted against the rendering distance of the fog all the time. Identifying targets has never been this easy. On the other end, it's much harder to see people who are hiding in bushes or simply crawling along on the ground; the fog weather makes the world very dark.There are also, I kid you not, spooky ambient sounds that play constantly.Those qualities make for some very intense and visually striking encounters. A friend and I played a duo game in the fog where we fought in an open field, even more deadly with the view distance silhouette, and we lost track of another pair. We were constantly peering into the fog. This kind of guerrilla warfare, where you shoot and then slip out of sight, hasn't really been possible previously in PUBG. We also had a great moment where we could only locate enemy position based on muzzle flashes in the distance, which is a unique and bracing mode of play.PUBG now has more than 10 million players as well as a rising competitive scene, and the developers are clearly trying to generate novel interactions in the game by adding more weapons, changing item drop rates, and creating new weather effects. Unlike the sunset weather effect, a fog map turns PUBG into a significantly different kind of game, and that difference is what is going to keep this community involved in the game until it emerges, fully formed, from Early Access sometime later this year.