ASTORE.DAT contains information pertinent to live aliens in confinement.
ASTORE.DAT has a fixed size of 50 entries of 12 bytes each for a total file size of 600 bytes. Information below is arranged by the byte's hex offset, in bold.
00: Alien race:
00 = Unused entry 01 = Sectoid 02 = Snakeman 03 = Etherial 04 = Muton 05 = Floater 06 = Cellatid 07 = Silacoid 08 = Chryssalid 09 = Reaper 0A = Sectopod 0B = Cyberdisk
Once an alien is researched, its entry is erased by setting its race to 00.
01 = Commander 02 = Leader 03 = Engineer 04 = Medic 05 = Navigator 06 = Soldier 07 = Terrorist
02: Base at which the alien is imprisoned, using index values from LOC.DAT, your original base is always 00. A value of FF indicates that the alien is being transferred.
03-0B: It is unclear what, if anything, these values do. 0B gets set to 01 when an alien is in transit (this is in addition to setting the Base byte to FF). There is an intermediate value of 02 when an alien is selected for transfer but the "TRANSFER" button has not been clicked yet. Otherwise, these bytes tend to remain 00.
Note: TFTD v2 expanded ASTORE.DAT to 3600 bytes (300 entries of 12 bytes each), with the same format. Attempting to load a v2 or later saved game into the v1 version of TFTD will cause it to crash unless this file is truncated back to 600 bytes. Loading a v1 version of this file into a v2 or later version of the game will not cause any problems.
ASTORE.DAT 1st BYTE Alien type
01h Aquatoid 02h Gill Man 03h Lobster Man 04h Tasoth 05h Calcinite 06h Deep One 07h Bio-Drone 08h Tentaculat 09h Triscene 0Ah Hallucinoid 0Bh Xarquid
2nd BYTE Alien class
01h Commander 02h Navigator 03h Medic 04h Technician 05h Squad Leader 06h Soldier 07h Terrorist
These values define the alive aliens that we have in the base. The two values (one for the type and one for the class) must be entered in the first two bytes of the file. After the project has started or the aliens have been transferred to another base, the first byte will be 0. You can re-enter a new value to have other aliens.