Containing a trio of stand-alone adventures - each of which come complete with four pre-generated character and all necessary handouts - which were first created as demonstration games for the new edition of Call of Cthulhu, Gateways to Terror is an 88-page full-colour softcover book by Leigh Carr, Jon Hook and Todd Gardiner. Cover art was provided by Mariusz Gandzel, with interior illustrations by Chris Huth.
- "The Necropolis", in which the investigators delve beneath the sands in Egypt's Valley of the Kings.
- "What's in the Cellar?", the players must investigate the case of a man accused of killing his wife.
- "The Dead Boarder", a missing neighbour plunges the investigators into the world of the occult.
Gateways to Terror was released in 2020 in both print and digital formats.