Textopia

Textopia, occasional referred to in its documentation as "Textopia-Toolbox", is a German interactive fiction authoring system created by "Oliver Berse" (presumably also the author of Floyd, although there is not any overlap between the formats) in 1999. Textopia has no compiler, interpreter, etc. in a strict sense; instead, it is implemented as a Pascal library. As such, Textopia source files and the resultant games have no special extensions or structure, beyond those of generic Pascal files.

Identification
It is probably possible to identify Pascal programs that use the Textopia library by their library imports, which is, in all the demos,, although presumably the order and other aspects of arrangement are not fixed. Beyond that, the strings,  ,  ,  ,  ,  , and   are probably common enough that at least some of them will appear in all source files.

Links
[https://www.ifarchive.org/if-archive/programming/textopia/ The IF Archive directory for Textopia, containing an introduction, as well as source, demo, and manual files in archives. Everything but the IF Archive note is in German.]