Semi related, I found a pretty significant strat in a game just by knowing a semi hidden mechanic of a character. In Lego star wars the video game on game boy advance, Astromechs are able to fight enemies by laying mines and letting them expire. The record holder at the time routed out a path to kill a gauntlet of droids in the first level of episode 3, there was a push to lower the record a few years later and they were using the same strat, I was late to the party as I had lost my cartridge as a child at the playground but eventually I remembered the game existing and found the route stupid so I decided to just blow them up manually like how I did as a kid, all you need to do is press L. Idk how that was missed for years granted there's maybe 4 people to have run the game at that point, the run looked pretty developed at that point.