Keeper of the Ways
Summary
This one was a bit different. It was played on Donovan Bollard's birthday and it was actually a D&D campaign; not Call of Cthulhu. The investigators sent their minds to another dimension (a D&D dimension) to rescue Simeon Kantstandyerbitz's long-lost brother, Timeon Kantstandyerbitz.
The campaign runs for six episodes (3.501 to 3.506), released between The Fall of New Jerusalem and Radio Man. It is a D&D 5e game using Sandy Petersen's Cthulhu Mythos for 5e instead of Call of Cthulhu, with Alex Morrison as the DM. It begins in 3.501: Under a Strange Sky, when five amnesiac strangers wake on a hilltop beside a black pillar above the town of Evanstone.