Doomsday Engine

When debugging gameplay issues, it would be helpful to see more information about objects visually in addition to just ID numbers overlaid on top of the game view.

A new sidebar could be added as a debugging aid, for both developers and map authors:

• Add persistent "watches" on specific objects and surfaces, to see information boxes displaying their state.
• Highlight when values change.
• Trigger a breakpoint when a certain value changes (?).
• Edit state values on the fly (?).

This would essentially be a GUI for the inspect* console commands.