AKA: Red Box D&D
Authored by Frank Mentzer and published in a series of five books:
- Basic Set (1983); red box, levels 1–3
- Expert Set (1983); blue box, levels 4–14
- Companion Set (1983); teal, levels 15–25
- Master Set (1984); black, levels 26–36
- Immortals (1985); gold, levels 37+