In 1996 "Sierra" games were killing it on the PC gaming area. They were beautiful and creative, considering the hardware limitations of the time.
At the time i had just read Arthur Clarke´s "Rama" series, about an mysterious alien ship who were collecting species around the universe for its alien Zoo, humans included. So Sierra released a massive computer game about those books, in a beautiful box with 3 CDs, complete with filmed actors and CGI scenarios, in which humans astronauts board the passing ship "Rama" and explore its environments. I recall having a blast, spending weeks solving the (not so difficult) puzzles and riddles. Arthur Clarke himself appeared to give tips from time to time to the gameplay. If you´re into retro-gaming, they may you have a good hunt!