A number of details on the next Portal entry have supposedly emerged from a casting call for voice acting.

The listing claims that voice work on the next in Valve's wit-driven puzzle action series will "tentatively" begin at the end of July.

The role is said to demand "comic timing" due to the series' status as a "dark comedy."

The rest of the listing, which was obtained by Kotaku through the subscriber-only job site Breakdown Express, is dedicated to a character description. Those details, should you wish to view them, can be gleaned from this image of the complete listing.

Valve's acclaimed puzzle-action hybrid Portal will be given a sequel, according to the game's lead designer Kimberly Swift.

"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.

Update: Valve marketing VP Doug Lombardi has clarified that plans to bring new maps and content to the console editions of Team Fortress 2 are still up in the air.

Original Story: The new Team Fortress 2 maps headed to the PC soon will also be available on the console editions at no cost, according to Eurogamer.

The maps will come in the form of downloadable packs on both the PlayStation 3 and Xbox 360. No release date was given for the content, though the Badlands and Goldrush maps are due out on the PC next month, with a CTF version of Well already having seen release.

In an interview with the site, Valve marketing director Doug Lombardi also mentioned that the company's hit puzzle-action title Portal will not be a one-and-done release.

"There'll be more Portal, for sure," said Lombardi. "But the details of that, to be honest, we're still working out."