Loss of Lemmings: One
Make the 3rd Lemming an Attractor at the bottom of the first valley. One should escape over the hill to the right - make it a Rock Climber. Jump it onto the steel wall at the end of the grass, and make it an Exploder, timing from halfway up the second last steel block before the thin bulkhead, which should be blown away. Jump the rightmost dancer to free it, and quickly Balloon one out of the horde (NOT the attractor!) and Fan it across, bursting the balloon to land it on the ramp about in line with the one that jumped free. Make it a Slider. When the one walking along the grass gets underneath the steel column, make it Mortar - the explosion should blow the slider through the gap created by the exploder. Jump it onto the rock, let it swing into the sloped tunnel, and Jump it at the bottom of the slope, to prevent it swinging round and going to the exit. Platform x2 over the lake, and release the attractor.