Rexx-Adventure

Rexx-Adventure is an interactive fiction system created in 1995 by Mike DeSanto for OS/2 conceptually based on Adventure Game Toolkit. Atypically for interactive fiction systems, there is no compiler/interpreter separation and intermediate format; the Rexx-Adventure interpreter directly plays source files. Rexx-Adventure includes a GUI to try to prevent some common problems of interactive fiction formats, but it is nonetheless entirely text-based.

A Rexx-Adventure game file may optionally be accompanied by a file with the same base name but the extension .cmd (.CMD with OS/2 naming conventions) written in REXX, which provides supplemental features.

Rexx-Adventure apparently uses a separate savegame format.

Extensions
Rexx-Adventure source files have the extension .rad (.RAD due to OS/2 naming conventions).

Identification
Skipping lines beginning with semicolons, the first line of a .rad file should start with ASCII, the second  , and the third.

Links
Rexx-Adventure on the Interactive Fiction Wiki The single Rexx-Adventure file in the IF Archive, containing documentation, the intepreter, as well as a sample game A short essay by Mike DeSanto about Rexx-Adventure