Dangerous Journeys was a roleplaying game created by Gary Gygax, the cocreator of the original Dungeons & Dragons system.

The game was originally announced as Dangerous Dimensions but was changed to Dangerous Journeys in response to a threat of a lawsuit from TSR, Inc., the publishers of Dungeons and Dragons, and the company Gygax had cofounded, over objections that the "DD" abbreviation would be too similar to "D&D.

"[1] Created after his departure from TSR, the publication of this series of books by Game Designers' Workshop was met with lawsuits by TSR,[1][2] which ultimately saw the production of the game system cease.

According to a FAQ on the official Gary Gygax website, the Mythus Fantasy setting for Dangerous Journeys was one of several settings planned for the system.

Several books were produced for the line: At least one additional game in the Dangerous Journeys series was planned but never published: Electronic Arts began to develop a video game version, but it was never completed.