It's all a matter of timing
Number of lemmings that drop: 80
100% to be saved
Release rate: 1
Available time: 03:00
Turn the first lemming of the upper and lower entrance into a builder when they are over the first line in the platform (count from the right). Turn the first lemming from the middle entrance into a builder when he's halfway on the last part of the platform. The second lemming from the middle entrance should fall down, let him build from far right of the column. By this time the first lemming of the lower entrance should fall down, let him build als from far right of the column. Now let the next lemming that falls out of the lower entrance extend the first stair he comes to. The first builder from the middle entrance must continue building and also the next one that falls out of the middle entrance. Now the first lemming of the upper entrance should fall. Let him and the next one of the upper entrance build from far right of the column. By now the first lemming of the lower entrance should walk back, build over the gap. If you notice any lemming walking towards a gap, let that lemming build.
Last edit: Wednesday, 14 May 2008.
Main source: own words.
Graphics: Oh no! More Lemmings, Amiga platform.