XDBF

(most info here should be moved to GPD at some point)

XDBF files are used by the Xbox 360 as a generic database of sorts. It is used as the format for GPD (Gamer Profile Data) and SPA (Statistics, Presence and Achievements) files. SPA files are linked into an Xbox 360 executable during compilation and is used by the dashboard to generate the GPD files inside profiles and for Xbox LIVE information.

Header

Offset	Length	Type	Information
0x0	0x4	ascii string	Magic (0x58444246)
0x4	0x2	unsigned short	Version (0x1)
0x6	0x2	unsigned short	Reserved
0x8	0x4	unsigned int	Entry Table Length (in number of entries)
0xC	0x4	unsigned int	Entry Count
0x10	0x4	unsigned int	Free Space Table Length (in number of entries)
0x14	0x4	unsigned int	Free Space Table Entry Count

Entry Table

The Entry Table is made up of different entries, each one under a different type.

An ID of 0x100000000 indicates that the entry is a Sync List, an ID of 0x200000000 means its a Sync Data entry.

The Settings, Achievement and Title types each have their own Sync List and Sync Data entries.

An ID of 0x8000 usually indicates that entry is information to do with the title (image/name).

Entry Structure

Offset	Length	Type	Information
0x0	0x2	signed short	Type (see below)
0x2	0x8	signed long	ID
0xA	0x4	signed int	Offset (not the real one, see below)
0xE	0x4	signed int	Length

Entry Types

Value	Description
1	Achievement
2	Image
3	Setting
4	Title
5	String
6	Achievement Security (? created by GFWL for offline unlocked achievements)