A Poison Tree is a campaign for Trail of Cthulhu, a generational saga that spans the globe and 350 years of history.
The players take on different roles across five chapters and three interludes, beginning in rural Wales in the seventeenth century, passing through settings as diverse as revolutionary-era Massachusetts, South Africa in the 1890s, England at the start of World War I and Berkeley in the psychedelic throes of the 1960s. The campaign culminates in world-changing events in the present day, as the players correlate all of their findings, and decide on the destiny of humanity itself!
The varied time periods and the strange abilities of the Whettall family, whose tainted bloodline drives the story, have demanded some tailoring of the GUMSHOE mechanics. The campaign features new Professions and Abilities tailored to each setting, providing foundations for evocative and period-appropriate characters. Many investigators will be members of the Whettall bloodline, able to tap into strange abilities that are as much curses as boons. These abilities grow in strength and strangeness across generations, providing entertaining twists, even for experienced Trail of Cthulhu players.
A Poison Tree was originally conceived and written by Matthew Sanderson, Paul Fricker and Scott Dorward, and has been developed and updated by Gareth Ryder-Hanrahan.