This event is also unavailable for any Hivemind Empire with a Gestalt Consciousness. It should be noted that the systems containing Guardian creatures like the Infinity Machine and the Dimensional Horror can never trigger the event, even after they’ve been defeated. To increase your chances of the event popping up, you should have several science ships regularly travel through as many black hole systems as possible. The initial event itself has a very small chance to trigger every time a science ship with a scientist assigned to it enters a black hole system. The event was written by the British writer Alexis Kennedy and introduced in update 1.4 as a kind of Lovecraftian horror tale. The infamous Horizon Signal is considered the rarest, longest, and most complex event chain any player could ever encounter in the game. A big part of the fun in playing Stellaris is exploring the galaxy and uncovering long-lost secrets and treasures in the form of events, some going even beyond human understanding.

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