Quoting a tweet from @spooookmon:
Blizzard left all of the master lotcheck submission files & unstripped .ELFs in the Switch title Diablo III: Eternal Collection's RomFS
Twitter
What you get from these is close to having Diablo 3 source code 8)
The nss files from the picture are ELF files you can load in IDA and get all the juicy stuff. Please note that the switch has an ARM64 processor not an x64 (but the source should be almot the same)
You'll need the nsp that's been circulating around (google it) and then extract the files with hactool.
Code:
hactool -t pfs0 --pfs0dir=01001B300B9BE000 "Diablo III Eternal Collection [01001B300B9BE000][v0].nsp"
From the extracted folder you can get the titlekey from the .tik file (open in an hex editor and it's at offset 0x180). With that titlekey and the usual hactool keys (google them) you can extract the romfs.
Code:
hactool -k keys.dat --titlekey=XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX --romfsdir=romfs 01001B300B9BE000/244b84153edddf42407aa2a03572202a.nca
After that just throw the nss files into IDA and enjoy.