5. Trivial Pursuit
This general knowledge board game where contestants need to answer questions in order to collect ‘pieces of pie’ in each colour in order to win, soared to fame in the 1980s when it sold 30 million copies between 1983 and 1985. Ironically, it was borne out of a failed Scrabble game: two friends, Canadians Chris Haney and Scott Abbott, decided it would be more fun to come up with their own game, and just a few hours later, they created the basic concept for Trivial Pursuit. It was a worthwhile venture, dubbed by Time Magazine as ‘the biggest phenomenon in game history’. To date it has sold more than 100 million copies since its creation in 1981.