Modder ‘Sidiusz’ has released a pretty cool mod for Atomic Heart that adds overcast weather with rain to it. From what I can remember, the game always had sunny weather. There was one scene in which we got some rain effects (at the beginning while flying through clouds), but I really can’t remember any cloudy weather. As such, this mod will let you experience the game in different weather conditions.
In future versions, Sidiusz will change the sky from simple gray to cloudy. The modder will also add rain sounds, as well as thunder effects.
You can download the mod from here. Below you can also find a video that showcases this mod in action.
Speaking of Atomic Heart, you can also find mods that bring a Walk Mode, and add support for NVIDIA’s DLSS. There was also a FOV mod but Mundfish has released a patch that introduced a FOV setting to the game.