You gotta check out this Portal flash game Here

It's just like real portal, but without all the fancy graphics and the amazing humor. The game does have way more levels than actual portal though, which is a huge plus.

It pretty much speaks for itself. Any fan of Portal or flash games or just cool games in general (this means you) need to check this out. How the hell did they get away with the copryright issues behind this? Who cares. It's one of the best flash games I've ever seen and anything Portal related is golden in my book!