Niles produced several modules for the "D&amp;D" game, including "X3 Curse of Xanathon", "B5 Horror on the Hill", "CM1 Test of the Warlords", and "H1 Bloodstone Pass", and Dragonlance modules "DL2 Dragons of Flame", "DL6 Dragons of Ice", "DL9 Dragons of Deceit", and "DL11 Dragons of Glory". Niles is the designer of 1985's "", a grand strategic game. Niles worked on the "Battlesystem" Supplement, "Star Frontiers" modules "SF4 Mission to Alcazzar" and "SFKH1 Dramune Run", "Indiana Jones" module "IJ2 Raiders of the Lost Ark", the "World War II" Game, the "Sirocco" Strategy Game (with Zeb Cook), and the Endless Quest books "EQ #26 Tarzan and the Well of Slaves" and "Super EQ #3 Escape From Castle Quarras" for TSR. Tracy Hickman had gotten Harold Johnson, Jeff Grubb, Carl Smith, and Larry Elmore in on the idea of Dragonlance before Margaret Weis and Niles joined them. Niles authored the rulebook "Dungeoneer's Survival Guide" (1986). Niles had been working on a trilogy of Celtic-themed novels for TSR, Ltd., which were modified to become the first Forgotten Realms books, beginning with "Darkwalker on Moonshae" (1987). Niles also co-authored "The City of Greyhawk" boxed set with Carl Sargent, for which he designed the 96-page booklet "Greyhawk: Gem of the Flanaess". Niles and Paul Lidberg designed the board game "A Line in the Sand" (1991), which depicted the first US-Iraq War; it was one of the projects originating from TSR West, and was published the day the US bombing began thanks to Flint Dille's ability to convince the president of the company to make things move fast.