Unreal Engine provider and Fortnite developer Epic Games has been valued at $17.3 billion.
The updated post-money equity valuation comes after the close of a successful funding round, which has seen a further $1.78 billion poured into the company.
Epic was worth an estimated $8 billion just two years ago in the wake of Fortnite's early success.
The round was a mix of primary capital and secondary purchases from employee equity holders, and includes the recently announced $250 million strategic investment from Sony Corporation.
Other investors included Baillie Gifford, Fidelity Management & Research Company, Lightspeed Venture Partners, Ontario Teachers' Pension Plan Board, funds and accounts managed by BlackRock, funds and accounts advised by T. Rowe Price Associates, and David Tepper.
Previous investors KKR and Smash Ventures also contributed further funds, following their 2018 investment.
Founder and CEO Tim Sweeney remains in charge of the company.