There are 16 endings but no ending is born equal.

• 6 endings can be called bad endings: if you do something wrong an say goodbye to this human world not on your terms. 
  To collect them, you can try to be... generally unpleasant, bad, incompetent kitty.
  It might be easier to get them if you skip some RESEARCH completely: just click 'ALL SET' without adding much points to anything.
• 5 endings can be considered human endings: to achieve them, you need to beat the game ignoring Arcane matters.
• and finally, 5 endings are divine. however, not all divine endings are born equal!! two of them are of particular importance.
  • one happily ever after and general true end is achieved if you: 
    • don't do generally evil things 
    • have 100 in Divine Order by week 31 and win the fight with Cthulhu (potence + minions > 15 and divine order == 100)
    • hang out with Theodore enough
    • don't ever mess with his own judgements and perceptions
  •  second hidden special hard to get end  is with Death and you need to:
    • meet Death (use powers of the undead for your followers)
    • fail at getting money week 19; choose 'bank robbery' and then survive it 
    • have low reputation amongst The Pantheon
    • fail Theo's ascension requirements: either mess with his mind, or don't have 100 points in Divine Order
    • lose fight with Chtulhu
    • congratulations, you're now in a CatDog remake.