Heroquesting is a process hinted at in the Runequest / Glorantha setting rules since the first edition of the game. Were any rules ever published officially in the first three editions (Chaosium or Avalon Hill era), or for that matter, in an official form for later, but compatible editions? In a couple of the third edition modules (Haunted Ruins, Strangers in Prax) there are NPCs in the process of Heroquesting, and have some benefits reflected in their character sheets, implying there had been some thought toward defining this process at a later date. A passage in Sun County states (page 126):
Since, at the time of publication, rules governing Heroquesting are not available, [...]
This was published in 1992.