"Mad Scientist Ending".
As you proceed through the game you will meet a cat (Sharkov), you will eventually get a "yes or no" event where you find an address on his collar.
Choose "yes" and you will meet a scientist,
from here he will ask for 4 water, and someone to go to his house for an experiment (The person you send might return tired and sick).
Continue playing and open the door to him, and you will be off to SPACE!