In case you haven’t finished the game yet (it’s school exam season in quite a few countries, for example), then you might want to not watch this. Because it’s a typography of the entire end song. Major Spoiler.

Back in April, Geoff Keighley released Final Hours of Portal 2 – a follow-up to his “Final Hours” series of articles, that begun with “Final Hours of Half-Life” in 1998, and ended with “Final Hours of Half-Life 2” in 2004. It’s a digital book or story of sorts, a 15000-word interactive documentary chronicling Portal 2’s development. It was an iPad exclusive for a while. We even wrote about it.

And now, it’s finally where it belongs – on Steam.