0 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:
There is an evolving community of modders challenging each other to build the most popular new game levels.
Nintendo doesn't sell a portable Wii, but one intrepid modder took the initiative and built a Wii "laptop".
I lose patience with the whole thing - I'm not cut out to be a hacker or a modder.
You may not know it, but there's a healthy modder community for Macs.