Band

A Band is properly either Angband or one of its many variants.

However, a larger classification could be made to include games of similar feel.

Some guidelines:

• Set Your Own Pace: There isn't a hunger clock forcing you forward. (Or there is a shop to restock at) Levels are not preserved when you go up and down, so you can keep getting new monsters at any given difficulty level.
• Lots of Items: There are a lot of items, ranging from broken sticks to super amazing swords. Equipment upgrade paths are long, rather than being very short.
• Steep Power Curve: The PC is god-like powerful by the end of the game.