image/x-tga

Truevision's TARGA format, born in 1984 alongside the first consumer graphics cards that could show true-color images, and still a fixture in game-asset and VFX pipelines because it stores uncompressed or RLE-compressed pixels with a proper alpha channel and no codec drama. It was never registered with IANA, hence the x- name. The sniffer's nightmare: TGA's original 18-byte header has no magic bytes at all — every field is just plausible-looking numbers — and the TRUEVISION-XFILE marker added in version 2.0 (1989) sits in the file's final 26 bytes, so identification usually falls back to the .tga extension.

Defined by Library of Congress format description — TGA. Registry facts from the IANA media-types registry via mime-db.