Ryzom Core

The C++ codebase is complex and based on older MMO architecture from the early 2000s, requiring deep technical expertise to set up, compile, and modify effectively, with limited beginner-friendly resources.

As a legacy codebase, it may lack modern features, optimizations, and support for current graphics APIs or platforms, making it less suitable for cutting-edge game development.

AGPLv3 licensing can be restrictive for commercial derivatives, and the historical copyright issues with contributors, as noted in the README, add legal overhead and potential confusion.

Relies on a small, independent community for development and help, resulting in sparse documentation, fewer tutorials, and slower updates compared to mainstream engines like Unity or Unreal.