Complex sentence: Upon destroying a robotic dog constructed by the aliens, Max frees Hawkins, and uses a device to open a portal into which he heads, whilst Hawkins finds the co-ordinates of the alien home world and sets course.
Split into simpler sentences: Upon destroying a robotic dog constructed by the aliens, Max frees Hawkins, and uses a device to open a portal into which he heads. Meanwhile, Hawkins finds the co-ordinates of the alien home world and sets course.