Oregon Trail save game format

Oregon Trail save game format

Format type	Saved game
Save locations	Unrestricted
Elements saved	Stats, location, etc.
Games	The Oregon Trail

The save game format in The Oregon Trail is stored in a *.GAM file. The file is fixed-width.

Format

Offset	Data Type	Name	Description
0x00	UINT8	Identifier	Always 0xc0.
0x01	UINT8	Occupation	1 - Banker, 2 - Carpenter, 3 - Farmer
0x02	UINT8	Length of Name 1	Length of the first name.
0x03	char[10]	Name 1	The first character's name. Only read the length from above, the rest is garbage.
0x0D	UINT8	Length of Name 2	Length of the first name.
0x0E	char[10]	Name 2	The first character's name. Only read the length from above, the rest is garbage.
0x18	UINT8	Length of Name 3	Length of the first name.
0x19	char[10]	Name 3	The first character's name. Only read the length from above, the rest is garbage.
0x23	UINT8	Length of Name 4	Length of the first name.
0x24	char[10]	Name 4	The first character's name. Only read the length from above, the rest is garbage.
0x2E	UINT8	Length of Name 5	Length of the first name.
0x2F	char[10]	Name 5	The first character's name. Only read the length from above, the rest is garbage.
0x39	UINT8	Day Number	The day of the month (1-31).
0x3A	UINT8	Month Number	The day of the month (1-12).
0x3B	UINT8	Unknown	! Unknown.
0x3C	UINT8	Unknown	! Unknown.
0x3D	Real	Oxen	Number of oxen (no idea why this is a real!)
0x43	UINT16LE	Food	Pounds of food.
0x45	UINT8	Clothes	Suits of clothes.
0x46	UINT16LE	Bullets	Number of bullets.
0x48	UINT8	Wagon Wheels	Number of wagon wheels.
0x49	UINT8	Wagon Axles	Number of wagon axles.
0x4A	UINT8	Wagon Tongues	Number of wagon tongues.
0x4B	Real	Money	Money in dollars.
0x51	Real	Unknown	Unknown.
0x57	UINT8	Unknown	! Unknown.
0x58	UINT8	Unknown	! Unknown.
0x59	UINT8	Unknown	! Unknown.
0x5A	UINT8	Unknown	! Unknown.
0x5B	UINT8	Unknown	! Unknown.
0x5C	UINT8	Unknown	! Unknown.
0x5D	UINT8	Unknown	! Unknown.
0x5E	UINT8	Unknown	! Unknown.
0x5F	UINT8	Unknown	! Unknown.
0x60	UINT8	Unknown	! Unknown.
0x61	UINT8	Rations	Rations (0 - Filling, 1 - Meager, 2 - Bare Bones).
0x62	UINT8	Pace	Pace (0 - Steady, 1 - Strenuous, 2 - Grueling).
0x63	UINT8	Unknown	! Unknown.
0x64	UINT8	Unknown	! Unknown.
0x65	Real	Unknown	! Unknown.
0x6B	Real	Unknown	! Unknown.
0x71	UINT8[17]	Route History	Landmark index of route.
0x82	UINT8	Unknown	! Unknown.
0x83	UINT8	Turn	Current turn.
0x84	UINT16LE	Total Miles	Total miles traveled.
0x86	UINT16LE	Miles Past Landmark	Miles since the last landmark.
0x88	UINT8	Miles to Next Landmark	Miles to the next landmark.
0x89	UINT8	Next Landmark	The next landmark index (see below).
0x8A	Real	Unknown	! Unknown.

Landmarks

Index	Landmark Name
0	Independence
1	Kansas River crossing
2	Big Blue River crossing
3	Fort Kearney
4	Chimney Rock
5	Fort Laramie
6	Independence Rock
7	South Pass
8	Fort Bridger
9	Green River
10	Soda Spring
11	Fort Hall
12	Snake River
13	Fort Boise
14	Blue Mountains
15	Fort Walla Walla
16	The Dalles
17	Willamette Valley

Credits

This save game format was reverse engineered by TheAlmightyGuru. If you find this information helpful in a project you're working on, please give credit where credit is due. (A link back to this wiki would be nice too!)