Which company published Portal?

Which company published Portal? Valve published Portal.

Valve handled both development and publication of the 2007 game. The company first released Portal as part of The Orange Box, a collection that also included Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two and Team Fortress 2. This bundle gave the experimental puzzle game a large audience alongside established Valve titles.

Portal was initially released for Windows and Xbox 360 on October 10, 2007, followed by the PlayStation 3 version on December 11. Valve later made the game available as a standalone retail and digital product. The company also published later versions and ports, although some platform releases involved outside partners or specialist developers.

The most important distinction is between publisher and inspiration. The game grew out of the student-made Narbacular Drop, but that project did not publish Portal. Valve’s role covered the finished game’s development and original publication, making Valve the canonical answer to this question.