Creepy Video Game Endings

Good job on destroying the flow of time and reincarnation for the entire universe. Everything that dies from that point on will be erased from existence; good thing it ends with you marching off to kill YAHWEH himself!

Gives finality to the major antagonist, but... also to the protagonist. A third game was supposed to be made to continue the story, but due to multiple factors, the game was never finished, leaving a "secret password" without a purpose and the game's canon in an unsettling open-ended conclusion. Growing attached to the protagonist, finding the lack of a continuation was downright depressing.

All right, so this game is nigh impossible with or without save states (insert "ya i beet that game w/o eyebalz" here), and so the infinite lives that the game gives you become irrelevant when, during the credits, you're challenged to a final confrontation with Death, and if you lose, you get BAD END. Unfortunately, it's extremely easy to get your *** killed by this boss. There are also no passwords, so retrying this encounter ordinarily requires beating the extremely difficult game again in its entirety. When you do win, you get the GOOD END, which is still a bad end; people speculate that the game developers never added an appropriate ending because they believe that they were short on time/didn't think people would ever beat the game, but looking at it from the right perspective, it's an appropriate ending. Irony for the people who wanted a happy ending.