Dangerous Journeys

What became of Gary Gygax after Dungeons and Dragons?

One possible answer is Dangerous Journeys! His product competed with the TSR Dungeons & Dragons line for a bit.

From the back of the core rulebook:

"Roleplaying at its finest—simple or with elective complexities which place this game far beyond any other.
Straightforward mechanics, with emphasis on percentile dice and the six-sided die, yet allowing a battery of optional modifiers to heighten realism to any degree desired.
More than 50 starting vocational backgrounds for Heroic Persona creation, plus as many personalized ones as the gamemaster wishes to add.
A "Knowledge/Skill" system using percentile probabilities, with hundreds of areas and sub-areas to learn, and specializations too. With Joss, So1992 ... 414 pages ... GDW 5000 ... ISBN 1558781315cio-Economic Class considerations. Special Connections, Quirks, background information, and more included, never have RPG personas had the character and personality of the Heroic Personas herein or has roleplaying been so detailed and enabled.
More armor and weapons included than would be found in the arsenal of a medieval potentate! Use them with a short and easy combat resolution method, or with expansions that take into account virtually every salient feature of armed, magickal, and mental or spiritual battle, too.
Persona advancement based on logical and realistic standards, not relying on loot garnered and critters slain.
No totally fanciful monetary system with ridiculous standards and confusing pricing. Income and costs are as easy as knowing what a BUC is.
All this and still more... Need more details? Buy this book. In it, you'll find everything you need to begin playing. Along with it, pick up the Mythus Magick volume (Book II of these rules, with over 1000 magickal Castings, plus Powers, personalized Castings, and more!) and the Epic of Ærth companion volume (which describes the world of Ærth in detail). Find a comfortable place, and begin reading immediately. This work is a quantum jump in roleplaying games, something which enthusiasts have awaited for years!"