2015 · ソースブック（プレイを拡張するルール／オプション）

DayTrippers GameMasters Guide

Set shortly after 2100, this science-fiction roleplaying toolkit explores a multiverse of dream worlds, alternate Earths, distant planets, and other dimensions. Players take the roles of DayTrippers, explorers who pilot SlipShips through SlipSpace to recover knowledge and artifacts while facing physical and psychological dangers. The guide helps the gamemaster create surreal, single-session adventures that send the characters into a different reality and return them to Earth. It combines traditional and modern gamemastering techniques with random oracular prompts and surrealist-inspired generation tools for fast, interpretive play.