How many test chambers are there in portal?
Nineteen, but you’ve made a pretty silly mistake. “The Test Chamber” subforum is for usermade content 
This should be in “Technology & Gaming”.
EDIT: Or “Half-Life Series”
When I’m done explaining the amount of test chambers in Portal series, you’ll think your pilot’s license has been revoked with a Gravity Gun, held by a Heavy wielding an ice bow, while being covered by an AWP.
There. I think that sentence made a reference to every major Valve game. I’m a a badass.
To the topic.
Total, in singleplayer for both games, I count around a hundred chambers, including counting certain portions as chambers.
In coop, there’s about 60 chambers, give or take five.
Solved it for ya.
P.S.: I didn’t play Portal for about two months now (way too long, hehe), so it might not be entirely spot on.
Why did you go on to spoil half of the second game?
And wasn’t there this exact same thread a few months ago?
Yeah, I just got the weirdest sense of Deja Vu here. How does the same dumb thread happen multiple times?
Because the game’s two years old. And I’m an asshole.
But I’ve cut all the stuff out.