It was 1984 when Infocom's original The Hitchhiker's Guide to the Galaxy Game released. Now, 30 years later, the game is playable for free on the BBC 4 Extra website.

The 30th Anniversary Edition of the game keeps Douglas Adams and Steve Meretzky's original text adventure intact. However,  the interface has been given a visual overhaul to update it for a modern audience.

This new look improves the gameplay, too. A visual representation of your current location allows you to keep track of interactive items. It also records how many moves you have made, letting you beat yourself up about your inefficient problem solving after each session.

Keeping the original adventure intact means also preserving the game's punishing difficulty. Luckily, with years of FAQs to choose from, there should be plenty of help if you hit a brick wall.

Currently The Hitchhiker's Guide to the Galaxy Game 30th Anniversary Edition is only available online or on your iPad. According to the BBC's website an iPhone version is in the works, and should also go live soon.