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rrt/docs/rehost-queue/format-inventory-2026-04-21.md

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RT3 Format Inventory (2026-04-21)

This note preserves the current file-format inventory under rt3_wineprefix/drive_c/rt3 and rt3_wineprefix/drive_c/rt3_105, so future queue work can distinguish parser gaps from ordinary generic media/support files.

Parsed Game-Native Families

These formats already have checked loader or inspection support in the current repo:

  • .gmp, .gms, .gmx: SMP/map/save/sandbox container inspection and save-slice loading
  • .pk4: pack4 archive inspection and entry extraction
  • .bca, .bty: building-source inspection
  • .cty: cargo-type inspection
  • .lng: language-table inspection
  • .car, .lco, .cgo, .cct: engine-type inspection
  • .imb: inline resource-descriptor inspection
  • .win: window-resource inspection
  • .exe: campaign-oriented PE inspection for RT3.exe

RT3-Native Or RT3-Adjacent Unparsed Families

These formats are present in-tree and look like future RE/parser candidates, but the repo does not yet have a dedicated structured parser for them:

  • .105: version-suffixed executable copies such as RT3.exe.105
  • .dat: opaque game-data blobs such as emitters.dat
  • .g: shader text sources
  • .cfg: engine/game configuration files

Generic Media And Support Families

These files are present under the game trees, but they are generic media/resource/support formats rather than RT3-specific parser targets:

  • PE/DLL-style binaries: .asi, .dll, .flt, .m3d
  • media/resources: .bik, .bmp, .cur, .dds, .ico, .mp3, .scc, .tga, .wav
  • support/docs/scripts: .asm, .bak, .bat, .c, .css, .html, .js, .json, .log, .nsi, .pdf, .rtf, .txt

Current Counts

Normalized lowercase extension counts across both trees:

  • parsed game-native: gmp 86, gms 8, gmx 21, pk4 55, bca 173, bty 390, cty 92, lng 5, car 342, lco 170, cgo 74, cct 22, imb 2, win 3
  • RT3-native or RT3-adjacent unparsed: 105 2, dat 5, g 10, cfg 4

The immediate queue consequence is narrow: .gmx is already a known parsed container family, so it belongs in local save-corpus scans by default. The remaining unparsed RT3-native families above are preserved here for future parser or RE passes, but they are not active queue heads today.