"Well, I believe Doug Lombardi who is our lead marketing director at Valve, has announced Portal 2," said Swift in an interview with G4TV.
Lombardi had previously stated that more Portal was on the way, but Swift's comment is the first mention of a true sequel to be made thus far.
No further details on the project were provided.
Portal won the Game Developers Choice Award for Game of the Year last night in San Francisco. It also took home the awards for Innovation and Best Game Design.