Dream Park Series by Larry Niven, Steven Barnes

For fifteen virtual reality gamers undertaking a four-and-half day quest, the fantasy slaying of monsters is suddenly interrupted-by murder.

Welcome to Dream Park-an amusement park where nothing is what it seems-except murder.

Dream Park, the ultimate in amusement parks, was about to embark on the greatest Game ever: the California Voodoo Game. Across the world bets were being placed; fortunes and reputations hung in the balance. Gaming careers would be made--or destroyed. And the most advanced software package ever invented was going to be tested.But one of the players was a murderer--and worse... moreDream Park, the ultimate in amusement parks, was about to embark on the greatest Game ever: the California Voodoo Game. Across the world bets were being placed; fortunes and reputations hung in the balance. Gaming careers would be made--or destroyed. And the most advanced software package ever invented was going to be tested.But one of the players was a murderer--and worse. Only Alex Griffin, head of Dream Park Security, and Game Master Tony McWhirter guessed the extent of the treachery tainting the Game. Somehow, they had to catch the killer--but above all, the Game must go on.... less

The Year: 2085. Humanity has spread throughout the solar system. A stable lunar colony is agitating for independence. Lunar tourism is on the rise....Against this background, professional “Close Protection” specialist Scotty Griffin, fresh off a disastrous assignment, is offered the opportunity of a lifetime: to shepherd the teenaged heir to the Republic of Kikaya on a fabulous vacation. Ali Kikaya will participate in the first live action role playing game conducted on the Moon itself... moreThe Year: 2085. Humanity has spread throughout the solar system. A stable lunar colony is agitating for independence. Lunar tourism is on the rise....Against this background, professional “Close Protection” specialist Scotty Griffin, fresh off a disastrous assignment, is offered the opportunity of a lifetime: to shepherd the teenaged heir to the Republic of Kikaya on a fabulous vacation. Ali Kikaya will participate in the first live action role playing game conducted on the Moon itself. Having left Luna—and a treasured marriage—years ago due to a near-tragic accident, Scotty leaps at the opportunity.Live Action Role Playing attracts a very special sort of individual: brilliant, unpredictable, resourceful, and addicted to problem solving. By kidnapping a dozen gamers in the middle of the ultimate game, watched by more people than any other sporting event in history, they have thrown down an irresistible gauntlet: to “win” the first game that ever became “real.” Pursued by armed and murderous terrorists, forced to solve gaming puzzles to stay a jump ahead, forced to juggle multiple psychological realities as they do...this is the game for which  they’ve prepared  their entire lives, and they are going to play it for all it’s worth. less