A signal in distant space is calling out to your empire. What does this entity want, and how does it know who you are? Horizon Signal is a new and rich storyline written by Alexis Kennedy, a British writer best known for his work at Failbetter Games, which he co-founded. His writing for Sunless Sea and Fallen London has been widely acclaimed, and now he is scribing new stories for Stellaris. This story update is a free DLC for Stellaris and highlights one of the great strengths of the game – its ability to tell stories that entertain and entrance without distracting you from the core strategic gameplay. The DLC consists of a somewhat rare event chain that can potentially be triggered at any time in your game. Even if you are playing a save that was started before installing Horizon Signal, the event chain can still occur in your game.