Frontier Developments is another highly successful video games company. The group was floated on the stock market in 2013, since when it has grown by leaps and bounds, moving from developing titles for third parties to publishing games in its own right. Publishing can be tricky. If games flop, losses can be ruinous, but Frontier has proved its mettle, attracting millions of players across the world with games such as Jurassic World Evolution, Planet Zoo and Elite Dangerous. Like Sumo, Frontier is run by its founder, David Braben. Now 57, Braben created his first game while studying Natural Sciences at Cambridge University 39 years ago.