6 1/2 hours

[KARR]

Yep! That is how long it taken me to complete Brothers A Tale of Two Sons leisurely and acquire all achievements.
One of the best games ever.

[deadcantdance]

Short, a bit to easy, but with a wonderful story.

[El Mythical 23 k.s.c.]

go buy antichamber

[poxtops]

Took me around 5 hours, and that was having to replay it about 3 times with different keyboards because the game hates my keyboards.

[markoh00]

Thee game had no problem with my keyboard (only cranking was a bit slow but only two times in the game) and I finished the game in 3 hours (without getting every achievement). Will play again to take screenshots of this beautiful game and get all achievements.

[KARR]

Yeah. I didn't get every achievement in one sitting. It was a course over time. Multiple playthroughs " with the help of online guides ".

[bdlio]

My playtime was only 5 hours (with 8 of 12 achievements) - I'll certainly play through it again, loved every moment of it. And I agree: one of the best games ever!
Incredibly beautiful and touching - I got it while it was on sale a while ago but knowing just how good it is I can easily recommend it at the regular price as well - and apparently it is on sale at gamersgate right now, so if you don't have it yet seize the opportinity!

[Buz]

I only played 3 hrs including going back after I finished to get the achievements. I like short games though - the concept would've got boring after a few more levels but as it was, just perfect.