One of the things I've noticed through both playing this game a lot and reviewing Angie's submitted runs is that our copies of the game have weapon upgrades in different locations.

Take for example my current Any% 'WR' (although 100% is a faster category apparently so I really should try and fix this soon lol) run, the most notable example is the first upgrade I collect, which is on a lone platform on the south western side of Glacia 1. Compare this with Angie's runs, where that same platform instead has a orange power orb.

I assumed this was a version difference between the Sega Saturn version and PS1 versions of the game, but having recently gotten a PS emulator running the games as well I've found that my version of that also has the weapon upgrade in that place.

This now poses the question, why are there different locations, and which set of locations is faster? I'd love to have the answer to this for future reference, and then maybe details on this can be added to Angie's great guide later