Introduce a unit unlock system that progressively grants access to new
unit types as the player advances through the campaign. Each mission
specifies which units each army can build, starting with basic units
and unlocking MD Tanks, Rockets, Anti-Air, Missiles, Lander, Cruiser,
and eventually the full armory.
- Add unit sprite sheet (advancewars-units.png) and artwork config
- Implement unlock validation in production and build options
- Add tutorial dialogue from Ethel explaining new mechanics and units
- Balance AI difficulty by reducing skill levels and aggression
- Adjust capture weights for more balanced AI behavior
- Add introductory city capture mechanic in first mission
- Update verification tool to support unlockedUnits
Brian Fertig
bf71bfc3c7