Multiuniversum Project: Cthulhu 是 Multiuniversum 的擴充。通往拉萊耶的傳送門已被開啟，現在有極度邪惡的東西從中湧出。此擴充包含一組新的傳送門以取代原本的傳送門，以及新增機制，為遊戲增添新的風險。
包含：
Swapping in the new portal tiles completely changes how the base game plays, and those Cthulhu cards bring a genuinely creepy vibe to the table. Played it with three people last weekend and we didn't touch the original portals once.
I expected an expansion to just bolt on more cards, but the R'lyeh portal actually forces you to rethink your whole route instead of just piling on points. The new portal tiles fit the original board without any fuss, and setup barely took longer.
The new portal set completely changes how you plan your turns, and the R'lyeh portal cards add a nice layer of dread to every round. Already my group refuses to play base Multiuniversum without it, the nasty stuff coming through keeps everyone on edge.