Lost Aliens objective is to get all the aliens to the bullseye. Clicking on an alien moves it one space to the right, and/or leapfrogs another alien next to it. Avoid landing aliens on the blue crystal's or they'll get stuck, and need a pyramid to get unstuck. To get a pyramid to work you'll need another alien to emit some sort of a pulse next to the stuck alien. More obstacles stand in your way with this addictive flash puzzle game.