Sagard the Barbarian
Sagard the Barbarian is a series of four Hero's Challenge Gamebooks written by Gary Gygax, co-creator of Dungeons & Dragons and Flint Dille, screenwriter and game writer/designer. The four books star the eponymous hero Sagard the Barbarian, and are titled The Ice Dragon, The Green Hydra, The Crimson Sea and The Fire Demon. They were 'fight a path' adventures which added a fighting game system to the normal pick-a-path game system.