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Rarest PC achievement in Portal 2

Rarest PC achievement in Portal 2
Who
Talent Show
What
1.6 percentage
Where
Not Applicable
When
28 May 2014
Portal 2's “Talent Show” PC achievement is the hardest of its kind on Valve's physics based puzzler. The achievement tasks co-op players with completing the sixth chamber of the Mobility Gels co-op course without dropping a single cube. As of 28 May 2014, only 1.6% of Portal 2 PC gamers had managed to pull it off. The second hardest is Still Alive, which challenges co-op players to complete Course 4 without either partner dying. As of 28 May 2014, only 1.7% teams were up to the task.