But Ken says modern communications technology has allowed them to work on Colossal Cave from anywhere. Since selling Sierra in 1996, Ken and Roberta have spent much of their time sailing the world, a lifestyle that doesn’t generally lend itself to running a game studio. There’s still probably more people that play that game each year than play a lot of the indie games that come out. “If you’re doing history, you don’t want to change it. “We’re trying to stay super faithful to the original version,” Ken says. The game features modern graphics and sound, and even support for virtual reality devices such as the Quest 2, but is otherwise unchanged from the original text adventure.