神话地世
指一种特定的对地城的理解，常见于早期 DnD 与 OSR 游戏中。 Philotomy’s Musings 总结了神话地世的特点：
- It’s big, and has many levels; in fact, it may be endless
- It follows its own ecological and physical rules
- It is not static; the inhabitants and even the layout may grow or change over time
- It is not linear
- There are many ways to move up and down through the levels
- Its purpose is mysterious or shrouded in legend
- It’s inimical to those exploring it
- Deeper or farther levels are more dangerous
- It’s a (the?) central feature of the campaign