Release Notes: Arbitrary in-memory save points can now be created. Undo is supported in more V5 Infocom games. Various other small enhancements and bugfixes have been added.
Release Notes: The license was changed change from GPLv2-only to dual-licensed GPLv2 and GPLv3. There have also been various small bugfixes.
Release Notes: The most significant change is the addition of meta-commands, the most important of which allows multiple undo to be supported in all games, including those that do not support undo at all.
Release Notes: Preliminary support for the @sound_effect opcode.