Modder

[Luis Fok]

A person who creates modifications or mods to video games. They do this by adding or manipulating content and code, typically via an [API] provided by [the games] developers.

These modifications can be as simple as altering the mechanics of a weapon in an fpsds, or as complex as turning one game into an entirely different one. Tha latter being known as a [total conversion].

[Dianne]

someone who makes changes to computer or games software or hardware (= equipment) , or to vehicles, in order to create their own version, as a hobby: