Games for Adults
Murder mystery games for adults have the benefit of not having to be censored for younger audiences. Game topics can also deal with experiences that a generation has experienced together, such as a World War II-themed game with a murder on an Army base. Or a journey back to the 1970s for a party full of drugs and hippies, with someone ending up dead by morning. Maybe there is a murder at your high school reunion. Another example of adult-themed murder mystery parties would be set in Las Vegas, which has plenty of material with its reputation as "Sin City."
Games for Teens
Successful murder mystery ideas for teenagers use entertaining and suspenseful plots without adult content. Teens are usually smart enough to enjoy the game without overbearing adult support. One example is a party in the 1920s. Teenagers obviously won't have lived during this time period, but it can be a fun theme for dressing up. Girls can wear big, flowing dresses, while boys get to wear pinstripes and top hats. Another possibility is a game based in medieval times, centering on the murder of the town's knight. Teenagers should reminded this is only a game and not take it overboard.
Games for Children
Murder mystery games intended for younger children need to be especially scrutinized for appropriate dialogue and situations. Look for games that include things familiar to children, while emphasizing it's a game and the fact that no one really died. Use the Harry Potter universe. One of the students has mysteriously died and no one knows the culprit. Another example is a fairy turning up poisoned in the forest. Children's games use imaginary environments and less-violent methods of murder to allow kids to enjoy the game while not getting the wrong idea.