Valve announced today the first bit of downloadable content for recent release
Portal 2 will be available free of charge to players on all available platforms sometime this summer.
The new content will include additional test chambers, leaderboards, and a "challenge mode" for single-player and co-operative play, according to the company.
Valve had
previously announced that user-created content for the title will be playable across the PC, Mac, Xbox 360 and PS3 versions of the game, though the editing tools themselves will be limited to the PC.
In 2009, the company offered free DLC to PC players of 2008's
Left 4 Dead, though those playing the Xbox 360 version
had to pay for the same content.
The PS3 version of
Portal 2 was Valve's first console title
enhanced with Steamworks support, allowing PS3 players access to cross-platform play, chat and messaging with PC and Mac players.
The original
Portal has sold
over 4 million retail copies through last week, according to Valve, excluding digital sales through the company's Steam digital distribution service.
