High Quality Content by WIKIPEDIA articles! Hollow Earth Expedition is a pulp 1930s role-playing game set in the fictitious Hollow Earth, published by Exile Game Studio. The game has been nominated for several Origins and ENnie awards since its release in 2006. The main rule book is Hollow Earth Expedition, and it is often abbreviated as HEX. Hollow Earth Expedition uses the Ubiquity rules, which were also created by Exile Game Studio. The main feature of the system is its use of binary dice pool rolls to determine success.

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