I've tried to make my rounds through the disc, but I kept coming back to Portal until I'd completed it. I expect every part of this strange collection to be full of virtue, in the way that Valve's anomalous position in the games industry allows: self-funded development in their sky-high Bellevue commune until each product sings. But Portal is strange, even for them. Risky on every axis, we may now say that the "first person puzzle comedy" has now been proven out as a genre. The gameplay is strong, but Portal's unique combination of hilarity and menace elevates it, resulting in a few perfect, indelible hours of gameplay.