Video game endings may be some of the best in media, because you can affect them. Nonetheless, my top three are more straightforward, as in
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https://youtu.be/y6NGn9bA304?t=151 World Heroes 2 Jet Best Ending, because it's so random!
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Limbo of the Lost. The game, the myth! https://www.youtube.com/watch?v=URcvdDtnM_0
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Stack Columns: https://www.youtube.com/watch?v=vufEmB3qSNA So bittersweet!
What are your favorites?
All three of the Mother games.
Undertale (make fun of me all you want, but what other game finishes by telling you not to play ever again?)
There are tons more but I forget