Selling out the Phantom Thieves in Persona 5 and getting the bad ending as a result.
Thank God it was the bad ending and I was able to learn and fix what I did wrong to move on in the game, because if that was the Real Ending, I would have been SUPER pissed!!!
Pancho A. Ovies
PlayStation 4/Xbox One/Nintendo Switch: 2019 vs. 2020