forgottenserver 
The Forgotten Server is a free and open-source MMORPG server emulator written in C++. It is a fork of the OpenTibia Server project. To connect to the server, you can use OTClient or OpenTibiaUnity.
Getting Started
- Compiling, alternatively download AppVeyor builds for Windows
- Scripting Reference
Support
If you need help, please visit the support forum on OTLand. Our issue tracker is not a support forum, and using it as one will result in your issue being closed. If you were unable to get assistance in the support forum, you should consider becoming a premium user on OTLand which grants you access to the premium support forum and supports OTLand financially.
Issues
We use the issue tracker on GitHub. Keep in mind that everyone who is watching the repository gets notified by e-mail when there is activity, so be thoughtful and avoid writing comments that aren't meaningful for an issue (e.g. "+1"). If you'd like for an issue to be fixed faster, you should either fix it yourself and submit a pull request, or place a bounty on the issue.