The 1 on 1 Adventure Gamebooks were a series from TSR published in the mid-1980’s. Each player made use of one of the pair of complementary books, and played one side in the conflict. Each story in this 10 book series was released as a boxed set containing two books. Each person takes a different book and controlling different characters, allies and companions. Most of the stories are set in the worlds of TSR role-playing games (mainly Advanced Dungeons & Dragons), though the second book is a generic space opera and the eight one was based on Marvel Comics’ Fantastic Four verses Dr Doom and the ninth is a Daredevil verses Kingpin adventure. The rules vary from book to book, but in general, players take turns moving from place to place and collecting items by reading passages in the books, occasionally fighting when they happen to end up in the same location. Some books are extremely tactical in feel, with players sending different characters into different locations to set traps for enemies; others are more story-oriented. Either way, there is plenty of player interaction, because in addition to fighting the other player, each participant must also frequently act like a game master in a role-playing session, controlling monsters encountered by his or her opponent or, in the case of the particularly role-playing-oriented seventh set, acting out the parts of various personalities encountered in the text. None of the books require the use of dice; most require the players to simultaneously shout out random numbers and then cross-reference them on a chart, while one book instead uses paper-rock-scissors. Some of the books can be adapted to be played by a single person, though the adventures that benefit the most from player interaction really do require two people.