Unity makes what is known as a game engine, the code beneath the graphics and sound of a game that handles its basic operations. Game engines are essential for developers, greatly accelerating the completion of a game.

Unity’s game engine is especially common among mobile games, which are growing far more quickly than traditional console games. Unity estimates that its engine is used in more than 31 percent of the 1,000 top grossing mobile games.

The company also estimates that its software is used in about 90 percent of the content created for Gear VR, a virtual reality platform designed by Samsung and the Facebook-owned Oculus that uses mobile phones as a screen.

An even more promising area of growth for Unity in the near term could be augmented reality, which burst into the mainstream in the last week with the release of Pokémon Go.

While Unity declined to comment on its valuation, the company’s chief executive, John Riccitiello, said in a phone interview that the company, which was founded over a decade ago, did not have an immediate need for the money. “On other hand, if we ever need that much money, it’s generally dumb to wait until you need it,” said Mr. Riccitiello, who was previously the chief executive of Electronic Arts, a game publisher.