Version 2.1 of WadC is dedicated to the memory of Professor Seymour Papert (1928-2016), co-inventor of the LOGO programming language.
- lots of improvements to the GUI: better default size, undo/redo support, internationalisation, etc.
- Doom 1, Heretic, Hexen and Strife support
- more libraries: control sector management; boom generalised linedef/sector generators; thing definitions for heretic/hexen/strife; new math routines
- lots of new examples: boom generalised sector/line types; binary ripple counters; Hexen polyobjects; examples of Doom 1/Heretic/Strife support
- lots of bug fixes, including a major one for line splitting when overdrawing lines