Worked on the OpenKore/openkore repository to address a critical gameplay issue by correcting portal and warp data for Prontera and Kafra locations. Focused on game data management, the developer analyzed and patched ROla table entries, adjusting warp coordinates and related flags to restore accurate portal functionality. This targeted bug fix improved data integrity and reduced warp-related incidents, directly supporting more stable gameplay experiences. The work involved careful data patching, use of version control systems, and collaboration with other contributors to ensure the solution aligned with expected in-game behavior. Primary technologies included text-based data formats and collaborative code review workflows.