FF8/GameSaveFormat

The save format

Offset	Size	Data
0x0000	2 bytes	Checksum
0x0002	2 bytes	Always 0x08FF
0x0004	2 bytes	Preview: Location ID
0x0006	2 bytes	Preview: 1st character's current HP
0x0008	2 bytes	Preview: 1st character's max HP
0x000A	2 bytes	Preview: save count
0x000C	4 bytes	Preview: Amount of Gil
0x0020	4 bytes	Preview: Total number of seconds played
0x0024	1 byte	Preview: 1st character's level
0x0025	1 byte	Preview: 1st character's portrait
0x0026	1 byte	Preview: 2nd character's portrait
0x0027	1 byte	Preview: 3rd character's portrait
0x0028	12 bytes	Preview: Squall's name (0x00 terminated)
0x0034	12 bytes	Preview: Rinoa's name (0x00 terminated)
0x0040	12 bytes	Preview: Angelo's name (0x00 terminated)
0x004C	12 bytes	Preview: Boko's name (0x00 terminated)
0x0058	4 bytes	Preview: Current Disk (0 based)
0x005C	4 bytes	Preview: Current save (last saved game)
0x0060	68 bytes	Guardian Forces: Quetzalcoatl
0x00A4	68 bytes	Guardian Forces: Shiva
0x00E8	68 bytes	Guardian Forces: Ifrit
0x012C	68 bytes	Guardian Forces: Siren
0x0170	68 bytes	Guardian Forces: Brothers
0x01B4	68 bytes	Guardian Forces: Diablos
0x01F8	68 bytes	Guardian Forces: Carbuncle
0x023C	68 bytes	Guardian Forces: Leviathan
0x0280	68 bytes	Guardian Forces: Pandemonia
0x02C4	68 bytes	Guardian Forces: Cerberus
0x0308	68 bytes	Guardian Forces: Alexander
0x034C	68 bytes	Guardian Forces: Doomtrain
0x0390	68 bytes	Guardian Forces: Bahamut
0x03D4	68 bytes	Guardian Forces: Cactuar
0x0418	68 bytes	Guardian Forces: Tonberry
0x045C	68 bytes	Guardian Forces: Eden
0x04A0	152 bytes	Characters: Squall
0x0538	152 bytes	Characters: Zell
0x05D0	152 bytes	Characters: Irvine
0x0668	152 bytes	Characters: Quistis
0x0700	152 bytes	Characters: Rinoa
0x0798	152 bytes	Characters: Selphie
0x0830	152 bytes	Characters: Seifer
0x08C8	152 bytes	Characters: Edea
0x0960	bytes	TODO

Guardian Forces

The checksum calculation starts here.

There are 16 G-F: Quetzalcoatl, Shiva, Ifrit, Siren, Brothers, Diablos, Carbuncle, Leviathan, Pandemonia, Cerberus, Alexander, Doomtrain, Bahamut, Cactuar, Tonberry, Eden.
For each G-F:

Offset	Size	Data
0x00	12 bytes	Name (0x00 terminated)
0x0C	4 bytes	Experience
0x10	1 byte	Unknown
0x11	1 byte	Exists
0x12	2 bytes	HP
0x14	16 bytes	Complete abilities (1 bit = 1 ability completed, 9 bits unused)
0x24	24 bytes	APs (1 byte = 1 ability of the GF, 2 bytes unused)
0x3C	2 bytes	Number of kills
0x3E	2 bytes	Number of KOs
0x41	1 byte	Learning ability
0x42	3 bytes	Forgotten abilities (1 bit = 1 ability of the GF forgotten, 2 bits unused)

Characters

Squall, Zell, Irvine, Quistis, Rinoa, Selphie, Seifer, Edea. For each character:

Offset	Size	Data
0x00	2 bytes	Current HPs
0x02	2 bytes	Max HPs
0x04	4 bytes	Experience
0x08	1 byte	Model ID
0x09	1 byte	Weapon ID
0x0A	1 byte	STR
0x0B	1 byte	VIT
0x0C	1 byte	MAG
0x0D	1 byte	SPR
0x0E	1 byte	SPD
0x0F	1 byte	LCK
0x10	2*32 bytes	Magics
0x50	3 bytes	Commands
0x53	1 byte	Padding or unused command
0x54	4 bytes	Abilities
0x58	2 bytes	Junctionned GFs
0x5A	1 byte	Unknown
0x5B	1 byte	Alternative model (Normal, SeeD, Soldier...)
0x5C	1 byte	Junction HP
0x5D	1 byte	Junction STR
0x5E	1 byte	Junction VIT
0x5F	1 byte	Junction MAG
0x60	1 byte	Junction SPR
0x61	1 byte	Junction SPD
0x62	1 byte	Junction EVA
0x63	1 byte	Junction HIT
0x64	1 byte	Junction LCK
0x65	1 byte	Junction elemental attack
0x66	1 byte	Junction mental attack
0x67	4 bytes	Junction elemental defense
0x6B	4 bytes	Junction mental defense
0x6F	1 byte	Unknown (padding?)
0x70	16 * 2 bytes	Compatibility with GFs
0x90	2 bytes	Number of kills
0x92	2 bytes	Number of KOs
0x94	1 byte	Exists
0x95	1 byte	Unknown
0x96	1 byte	Mental Status
0x97	1 byte	Unknown