MTBG stands for “My Turn-Based Game”, an open-source game engine in the style of Ultima 4-6 (but which borrows features from Ultima 7 as well). Kay “Claus” Tila has been developing it for a year or so at this time, and released it on GitHub earlier this year.

Planned features for the engine include:

• animated graphics for background images, weather effects, npcs, missile weapons, and spells
• Full drag-and-drop support within the UI
• Keyboard command framework for all in-game functions
• Visibility calculation based on tile type (fog of war)
• night/day cycle
• MUSE type music system (soundtrack hanges with location, but also with combat and combat situation)
• NPC scheduling system
• containers
• brightness calculation for light sources

You can follow development on MTBG on GitHub, of course. Claus also posts regularly to a post on the project development forum in the UDIC Discord server.