 He co-founded the RPG magazine "Inter*action" with Andrew Rilstone, the first issue of which was published in Summer 1994.In October 1994, Wallis founded Hogshead Publishing, a company which specialised in role-playing and storytelling games.Wallis based the company in the UK, and got a license from Phil Gallagher at Games Workshop to publish books for "Warhammer Fantasy Roleplay".