This is a Early Alpha release of an upcoming AGS 4.0, offered for public test.
WARNING: this version guarantees project import from the latest 3.* versions only (3.6.0 currently). If you want to upgrade an older project, you'd need to import it into the 3.6.0 first and save there.
Runtime compatibility (running older games) is not exactly guaranteed, although 3.6.+ games still may run if they don't use deprecated API and settings.
All the older deprecated script API and game settings have been cut of and are no longer supported, except ones that have no equivalents.
Includes new script compiler by @fernewelten.
The new compiler's features explanation may be found here (in technical style):
https://github.com/adventuregamestudio/ags/wiki/Features-of-the-new-Script-Compiler
The more human-friendly cheat sheet:
https://github.com/adventuregamestudio/ags/wiki/New-compiler%27s-end-user-cheat-sheet
Full Changelog may be found here:
https://github.com/adventuregamestudio/ags/blob/ags4/Changes.txt
People who were working on this release:
@AlanDrake
@fernewelten (new script compiler)
@ivan-mogilko
@persn (open room format, improvements to the Editor)