__NOWYSIWYG__ For this achievement the easiest method would be to just go in challenge mode and just play through until you can use blast then lure your enemies closer to the edge and use the blast. This is fairly easy. For those that make good use of their energy blast, this achievement is easily earned just by playing through the levels without trying to achieve it. A good strategy would be the fourth level, because there are a lot of small enemies. When you are surrounded, use your blast and they will be expelled throughout the portals.