I don't exactly have a website, but I can post a list of all the stuff I remember:
Guilty Gear: The Missing Link (PlayStation)
---Had a hidden Alien in Millia Rage's stage.
---If you played the disc like a music CD it had the hidden track "Meths".
---Several "bonus tracks" were in the game's Music Test, including a remix of the track "Suspicious Cook".
---Voice Samples could be ripped from a program called PSound.
Guilty Gear X: By Your Side G.Gear (PlayStation 2 / Dreamcast / NAOMI Arcade)
---If you played certain versions of the Dreamcast Disc it had a Desktop Theme you could install, and certain songs you could play.
---PS2 version featured redone audio tracks from the "Heavy Rock Tracks" album.
---Hidden Alien in Millia Rage's "Russia" Stage.
---Sound Test featured several "unused" voices that were modified (Robo-Ky was a hidden character and used Ky's unused samples).
---Gold and Black color palletes could be selectable, but didn't have the Gold powers the Survival Mode versions had.
---Tag Team Mode was featured in the "Guilty Gear X Advance Edition" for GBA and had special team quotes.
---Advance Edition featured an "EX Ky Kiske" with GG1 based movelist.
Guilty Gear Petit "Puchi" 1 + 2 (Wonderswan Color)
---New Character "Fanny" had a Story Mode.
---Story Mode in this game actually "predates" the Story Mode found in Guilty Gear X Plus.
---"Classic Millia" was playable as an alternate form of Millia Rage.
---??? Mostly Unknown/Untranslated.
Guilty Gear X Plus / 1.5 (PlayStation 2 / Atomiswave)
---Added Kliff and Justice (old sprite versions that were later redrawn for GGXX), Kliff had "slow" voice samples, and Justice had no voice samples at all.
---Alternate Character Select Screen / New Boss Intros for Testament and Dizzy (GGX 1.5)
---EX Mode (also alternate fighting styles that transitioned in to GGXX)
---Gold/Darkside (black) colors now had special effects added (retained in GGXX)
---Text-based Story Mode
Guilty Gear XX: The Midnight Carnival (NAOMI Arcade / PlayStation 2)
---Kliff and Justice sprites were redrawn.
---Full Audio Story Mode with Text.
---Robo-Ky with "Green Skin" and eye laser.
---Hidden Alien in Millia Rage's "Russia" Stage.
---Tons of unused audio in Sound Test.
---Gold/Darkside/EX Modes
Guilty Gear XX "Red #Reload"
---Not many changes, except Robo-Ky was revised.
Guilty Gear XX "Blue #Reload"
---Rebalance across the roster and the basic standard for #Reload.
Guilty Gear XX #Reload (Korean version)
---Alternate Voicework and Tracks for all characters, also a new stage exclusive to Korean #R was added.
Guilty Gear Isuka (Atomiswave / PlayStation 2)
---Characters were based on #Reload, except for A.B.A. who was new to the series.
---Characters Had "Lane Attack", "Back Attack", and "Lane Jump" sprites.
---Color Pallete Editor (glitches on ABA for some reason)
---EX Mode
---Robo Ky Mk.2 Factory (with unlockables in its own version of Boost Mode)
---Boost Mode (unlocking certain aspects of the stages unlocked Awakened Sol and Ky, this mode's bosses)
---Hidden tracks for the various modes could be ripped via a PS2 audio ripper.
---Hidden Zako ABC "thugs" and Leopaldon boss were also unlockable.
Guilty Gear Dust Strikers (Nintendo DS)
---Characters had a "Dust Strike" sprite animation for either knocking down or kicking up characters.
---Super Boss "Gig" was an opponent with its own music theme.
---Mini games were added for the stylus.
Guilty Gear Judgement / Guilty Gear "Club" (PlayStation Portable)
---Had a Survival Mode and hidden character Judgement could be unlocked.
---Main story unlocked stories for other various characters.
---Club portable version featured a cellphone pocket version of "Missing Link" as well as a mode that let you edit stats of various monsters and have them fight in a pseudo-boost mode.
Guilty Gear XX Slash (NAOMI 2 Arcade / PlayStation 2 "Japan Only")
---Order Sol is playable and had several unused quotes in Sound Test.
---Arcade version had special unused quotes versus I-No which carried over in to Accent Core, but was censored for the console version.
---Hidden Alien in Millia Rage's "Russia" stage.
---Unused Quotes in Sound Test
---Testament and Dizzy had special quotes versus Justice.
Guilty Gear XX Accent Core (NAOMI 2 Arcade / PlayStation 2)
---Japanese PS2 version was full of glitches.
---Order Sol and A.B.A. were revised.
---Justice and Kliff were no longer playable and cut from the game.
---Hidden Alien in Millia Rage's "England" stage.
---Unused Quotes in Sound Test
---EX Mode was revised since Slash, also features Gold/Darkside colors with effects.
Guilty Gear XX Accent Core Plus / Append (PlayStation 2)
---Fixed glitches from early version
---Append Disc had a special cover (and maybe extra content?).
---Justice and Kliff were revised / added.
---Hidden Alien in Millia Rage's "England" stage.
---Old #Reload stages were unlockable. (Dizzy's old intro in Grove stage was an easter egg)
---EX Mode revised, Gold / Darkside modes also revised.
---Story Mode Added.
---Extra Menu with game system changing options added.
---Survival Mode Revised / Mission Mode Revised.
Guilty Gear XX Accent Core Plus R (PlayStation 3 / Sega RingEdge 2 / Steam)
---Fixed glitches from PS3 version (Steam Version that is)
---Justice and Kliff rebalanced.
---Burst Icon changed / from older HUD.
---Overall not many changes from Accent Core other than character rebalance.
Guilty Gear 2 Overture (XBox 360)
---Sound Test
---Mission Mode with unique items.
---Campaign Mode unlocked Ky Kiske.
---Raven was a bonus DLC along with an alternate outfit for Sol and bonus Stage (Sacred Order's Fortress)
---English Dub.
Guilty Gear VastEdge XT (Pachislot / iOS)
---??? (Mostly unknown)
---Concept Artwork was leaked as early as 2011 from the Pachislot version.
Guilty Gear Xrd: Sign (PlayStation 3+4 / Sega Ring Edge 2 / Steam)
---Unused Gold/Darkside Colors (Elphelt's "Darkside" color was actually her Final form in Story Mode).
---Prototype filler artwork used for Leo Whitefang DLC in early version of the game.
---New Characters: Bedman, Sin Kiske *Returning*, Ramlethal Valentine, Elphelt Valentine, Leo Whitefang
---Revised M.O.M. Mode (based on Mission Mode from GG2 and Survival Mode from earlier games)
---Ramlethal and Zato had "boss modes" in various arcade stories similar to a Gold Mode.
---Millia Rage's stage Dragonica Falls "might" have an Alien in it.
---Soundtest was replaced by Gallery Samples of promotional materials from the Arcade Webpage.
---DLC featured alternate System Announcers of the cast.
---English Dub.
Guilty Gear Xrd: Revelator (PlayStation 3+4 / Sega Ring Edge 2 / Steam)
---New Characters: Jack-O' (Valentine), Kum Haehyun "Tuner", Johnny *Returning*, Jam Kuradoberi *Returning*, Dizzy *Returning*, (possibly Raven *Returning*)
---???? (Mostly unknown) |