Portal 64 is an N64 demake of Valve’s classic, now available as a “First Slice”

Enlarge / Remember, this is the N64 platform running a game released at least five years after the console’s general life cycle ended. (credit: Valve/James Lambert)

James Lambert has spent years making something with no practical reason to exist: a version of Portal that runs on the Nintendo 64. And not some 2D version, either, but the real, blue-and-orange-oval, see-yourself-sideways Portal experience. And now he has a “First Slice” of Portal 64 ready for anyone who wants to try it. It’s out of beta, and it’s free.

A “First Slice” means that 13 of the original game’s test chambers are finished. Lambert intends to get to all of the original’s 19 chambers. PC Gamer, where we first saw this project, suggests that Lambert might also try to get the additional 14 levels in the Xbox Live-only Portal: Still Alive.

So why is Lambert doing this—and for free? Lambert enlists an AI-trained version of Cave Johnson’s voice to answer that question at the start of his announcement video. “This is Aperture Science,” it says, “where we don’t ask why. We ask: why the heck not?”