I would like to ask you if u already heared about a game called diablo or diabolo which allowed you to win btc around 2010, I can't find it anymore.
AFAICR, none of its versions had that feature by default, so you were probably playing it on a custom/private server and they tend to only last for a short time
[unfortunately]!
Btw, are you sure it was actually a game? Perhaps you were referring to "DiabloMiner" instead...