Add concrete wall as a tier 2 wall with research. More health and slightly higher resistances.
- Technology prerequisites: stone-wall, concrete
- Health: 500 (configurable in mod-settings)
- Resistances: Acid 0/85%, Explosion 12/35%, Fire 0/100%, Impact 50/65%, Laser 0/75, Physical 4/25%
- Ingredients: 1 Stone-wall, 10 concrete
- Production: 1s
- Stack size: 100 (configurable in mod-settings)
- Languages: All