More orbital laser kills
When you use the orbital laser (if you have it) and you end the wave using the orbital laser, if the laser is still shooting, set the laser crosshairs to the beggining of the map, where the aliens spawn and you'll get more kills, resulting in faster cash and the wave ends sooner. (use the orbital laser on bosses like the warriors, queens, or anthropods. Usually arachnids are after them.)
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