Lost Worlds is a "combat picture book game" designed and trademarked by Alfred Leonardi and originally published in 1983 by Nova Game Designs. The game has had many publishers, including Chessex, Emithill, Flying Buffalo and Greysea.

Flying Buffalo Inc. (FBI) is a game company with a line of role playing games, card games, and other gaming materials. The company's founder, Rick Loomis, began game publishing with Nuclear Destruction, a play-by-mail game which started the professional PBM industry in the United States. Loomis added games and players while introducing computer moderation and soon incorporated into the company Flying Buffalo Inc. The company published games in other genres, including card games such as Nuclear War and a role playing game called Tunnels & Trolls, a game similar to Dungeons & Dragons. Flying Buffalo acquired its 10,000th customer account number in 1980 and reached its largest size of 21 employees in 1983.