Place the items he has given you on the golden spots around the Pack-A-Punch machine.Survive until next round and then receive the items back from Hasselhoff.Once you have defended the SETI-COM successfully three times, give it back to Hasselhoff.Do this three times, in three different locations.
Wherever your screen shakes is where you will do the next step at! It will start flashing colors, remember the tones and colors! This is by far the most involved activity in Zombies in Spaceland - collecting it will unlock the Sooooul Key Achievement/Trophy.