Riven VARS resources

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The VARS resource is found in Riven saved game files (there is just one). It stores the state of every game variable. The data is just an array of 12-byte records, each representing a variable, with this structure:

unsigned long u0
unsigned long type 0 = unknown, 1 = integer
unsigned long value Saved variable value

u0 starts from 2, and seems to grow when going on with the game.

Fortunately, saved games contain a NAME resource that labels most variables in the VARS resource. The VARS record index simply matches the NAME one.

The number of records is not constant. If you save different games in different places then new records will appear, usually with u1 = 0 and strange values. However, "known" variables (dome combination, telescope levers state etc) are always at the same record.