What does "Re-1" mean in a game title?

[FamShoppa]

I'm trying to learn different things in LaunchBox. To that end I was looking to import my first multi-disc game.
So I randomly chose the 3Do console, which had a game with the discs named this way:
BrainDead 13 (USA) (Disc 1).zip
BrainDead 13 (USA) (Disc 1) (RE-1).zip
BrainDead 13 (USA) (Disc 2).zip

Inside those archives are Bin/Cue files (that have the same names as the archives).

I'm most confused by the "(RE-1)" titled disc.
Should I treat it as part of a set?
Is it a unique thing?

[Lordmonkus]

Checking the wiki page for it it seems the RE-1 is the revision 1 disk to fix some bugs.

https://en.wikipedia.org/wiki/Brain_Dead_13#Release

[DeadVoivod]

Here's a list of what codes mean within ROM names:

Standard Codes:
[a] - Alternate
[b] - Bad Dump
[BF] - Bung Fix
[c] - Cracked
[f] - Other Fix
[h] - Hack
[o] - Overdump
[p] - Pirate
[t] - Trained
[T] - Translation
(Unl) - Unlicensed
[x] - Bad Checksum
ZZZ_ - Unclassified
[!] - Verified Good Dump
(???k) - ROM Size

Special Codes:
[C] - Color GameBoy
[S] - Super GameBoy
(M#) - Multilanguage (# of Languages)
[M] - Mono Only (NeoGeo Pocket)
(PC10) - PlayChoice 10 (NES)
(1) - Japan (Genesis)
(4) - USA (Genesis)
(5) - NTSC Only (Genesis)
(8) - PAL Only (Genesis)
(BS) - BS ROMS (SNES)
(ST) - Sufami Turbo (SNES)
(NP) - Nintendo Power (SNES)
(Adam) - ADAM Version (Coleco)
(PAL) - PAL Video

[Suhrvivor]

Disc dumps inside zip files is an awful alternative when you can get them in chd format instead.