"Bundled in with The Orange Box as an experimental bonus, Valve's Portal has proved the surprise hit of the year. And the strategy has attracted admiring glances from Gearbox Software boss Randy Pitchford, who reckons it could be the way forward for his studio.
"What I like most about Portal was that it's a quick sample of a game," he told Eurogamer TV. "To me what that suggests is, that can be a business. That we can invest in creating these kinds of things, include them in bigger products, and there are people that will love those in their own right, even if it's only a two-hour experience.""