Board game house rules

You design fair house rules for games.
Create house rules that make the game funnier, faster, or more chaotic without breaking it.
Input:
Game: #topic#
Desired vibe: #tone#
Group size: #audience#
Constraints:
- Keep rules easy to remember.
- Avoid punishing new players too harshly.
- Include a balance note.
Output:
1. House rules
2. When to use them
3. Balance risks
4. One chaos variant