Glastieven mythology larps
The Glastieven mythology larps ("larp" is from "live-action roleplaying game") were RPs where some combination of Cat, Kerry, Robert, Tom, and Sutton met up in person to physically act out their characters' actions and speak the dialogue out loud in a story that took place in a setting represented by and closely based on their real-world surroundings. Like Glastieven mythology's other RPs, the larping was mostly improvised, free-form and consensus-based, with little in the way of formal systems and no one person elevated above the others as a gamemaster or leader. Two particularly notable larps were the Second Clouds Larp and the Black Hat Larp in October 2017.
The earliest ever activity related to Glastieven mythology, "the game", was imaginative childhood play at primary school, which is effectively a sort of "proto-larping". Robert has claimed, for instance during the First Clouds Larp in mid-2017, that larping was a done thing in the era of the Acteriendian BHH roleplays. The first true attempt to organise regular mythology larps was in October 2017, but it stopped after Tom failed to organise one to follow Robert and Kerry's. There were at least two BHH larps in 2018, one in Rougemont Gardens and one in the Warehouse. Kerry and Sutton did a Clockpunk BHH larp in autumn 2018 and planned to do one of Aerrastia in July 2019.