Kuntz learned about miniature wargames at age 13 while skimming through an issue of Playboy; he saw a game called Dogfight listed in a section describing party gifts for Christmas.

While meeting at Gygax's house, Dave Arneson ran the Lake Geneva gamers through their first session of Blackmoor.

Kuntz describes Dave Megarry as the de facto leader of the group, as he understood the Blackmoor game and campaign world.

Balrogs, followed a map to sixteen ogres and destroyed them with a wish from a sword we had procured from the hapless troll earlier.In 1972, at age 17 Kuntz only lived a few blocks away from Gygax, and got the chance to play in the second-ever game session of Dungeons & Dragons that was set in the World of Greyhawk, where his player character was a fighter named Robilar.

[3]: 8  That same year Kuntz, along with Gygax and Brad Stock, redeveloped the Lankhmar wargame for publication by TSR, from the original design by Fritz Leiber and Harry Fischer.

[3]: 240  Kuntz served in the company in many positions, as designer, editor, Director of Shipping, columnist for the Dragon Magazine, Convention Chairman (Gen Con VIII & IX and Winter Fantasy 1) and oversaw the AD&D line's licensing to Judges Guild for a short time period.

[3]: 240  Gygax was expanding Greyhawk in the early 1980s, and brought in Eric Shook and Kuntz to TSR to help him manage this creative work.

[3]: 240  Kuntz and Tom Wham designed the board game "King of the Tabletop" which appeared in Dragon #77 (September 1983).

[3]: 239 Necromancer Games announced a partnership with Rob Kuntz on May 16, 2001, after obtaining a license to revise his Creations Unlimited adventures for the d20 System.

[3]: 378  Troll Lord published the adventure Dark Druids (2002) by Kuntz, which he originally wrote in 1976 and set in the Gnarley Forest of Greyhawk.

[3]: 379  Kenzer & Company reprinted his adventure Garden of the Plant Master (2003) and later published CZA1: Dark Chateau (2005), which Kuntz had designed as part of Castle Zagyg.

[citation needed] Kuntz signed a contract with Black Blade Publishing to pick back up where he left off working on the "Lake Geneva Castle and Campaign dungeon levels".