Fix Ogre Battle for the N64 on a variety of fronts:
Alignment is broken in many ways. Also, alignment-changing items really need to do whole steps up/down.
I'd also add 'give people a reason to use legions that isn't stupid' to the list, or kick witches up to second tier support, or let golems wear helmets on account of the only thing on them is a cross helm and a pelt, or fix half the classes that are just completely useless after the first 5 stages (berzerker for instance).
Also, lycanthopy cycles. Vamps get a six hour window, but werewolves only three. That includes the little messenger guys when their lycanthropy is fixed.
Honestly, the game just needs a good swift kick to the head.
Actually I've been messing with this on-and-off. Just finally cracked all the compression formats on it, but documenting its 20000+ files is taking a bit of time ;*) That's just counting the filelist divisions too; some of those are archives or lzh multifiles. Oh, and haven't written a compressor for the huffman type yet.
Stats though are uncompressed, along with some other basic data. There's some old Nightmare modules lying around to edit some of it. I could always write something up in python too.
The reason for the temp save though has to do with save data sizes and how in-field saves will load based off one of the other saves. There isn't enough space in the flash for three full saves + in-field data. Even accounting for inefficiency it would be quite a feat just to stuff everything in there.