Duality is OpenSource and everyone can fix Engine Bugs. No waiting for company pace.
-Looks like a neat, compact and developer friendly framework.
-nice Plugin concept
-easy Contribution possible
-Mono port to Linux/Mac should be easily possible
But I still find it to complicated to seperate Editor from Projectdata and Game Runtime. ProjectData should be saved in one Folder (Project Plugin Source, Media, Ressources) to easily put it under Versioncontrol without adding the binarys.
Switching between Projects should be possible with one Editor Instance.
For prototyping Duality looks good, but for commercial games compared to Unity:
-runtime only runs on desktops Win (Linux/Mac later possible)
--> so ... not for mobiles :-(
--> barely usable for gamejams like LudumDare where most entries are for web
-runtime could be converted to html5 using http://jsil.org/
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