How long did it take you to beat Portal 1?

5 hours

I forgot. Right now I have 17.5h on Steam, but that includes getting every achievement, as well as some mods.

haven't completed but currently on 2 hours

Took me two hours.

This

An hour and 10 minutes the first time, playing through the Portal: Still Alive Arcade download on the 360. Beaten a few more times since then to get achievements, in all three versions of the game that I currently own.

4 hours apparently, though I assume that's rounded up lol

68 minutes, give or take.

3-4 hours, I´m not sure

1-1.5h

Easy piece of fake cake.

About 3-4 hours. I took it easy, explored and enjoyed the ride. Then another 2-3 hours for the commentary version. :)

Steam says it took me 3 hours - and I usually take my time when I play games. I never knew what portal was and it wasn't what I was expecting, lol... I didn't really like it, personally.

about 2h

About 3 hours, but I need some free time in order to get all the achievements.

About 20 years.

About an hour - it's short game, Portal 2 is a bit longer ;)

4 hours, but I didn't rush.

(And that is not doing all the challenge levels etc and not 100% the achievements)

5 hours with 2 hours spent on one level only :)) Forgot what level was that but it took me something to figure it out.

an afternoon

2 hours

It says 2 hours on my Steam, but I've played the game before I bought it from the bundle. First time must've been like 3.5 to 4 hours. Epic game!

3 hours.

2 hours

My fastest speedrun is 16 minutes at the moment :)