related to these: region-locked difficulties. The most infamous example is Castlevania 3, where the western version is full of bullshit (your dagger is thrown screen distance in JP, but becomes a tiny stabbing shiv in the western version, enemies become health sponges and bite off a chunk of your hp out of nowwhere, bosses fires walls of pain instead of patterns, the lists never ends) and the JP version is normal. Contra had a few games where the game is stuck on Easy mode on western release, while the JP versions got actual difficulties selectors. There's a bunch of other games like this but why the fuck did that exist