A conversion is taking elements from one game and putting them into another. Types include:
- System to system: Taking a game mechanic from one game and adapting it to another.
- Setting to system or setting conversion: Using the setting for one game with the rules to another.
- Setting to setting or stealing stuff: Using story elements from one game in another game.
Conversion necessarily includes a certain amount of house rules to make it work.
In miniatures, conversion means modifying a figure.