the.com/modding
players fixing games the developer swore were already finished.
means the practice of altering a game's code, art, or rules to change or extend how it works, officially sanctioned or not.
from traces to 1980s hardware hacking and doom's 1993 wad files, when id software left the engine open and players rebuilt the game from scratch.
counter-strike originstarted as a half-life mod in 1999
skyrim modsoutnumber the game's actual quests hugely
dota's rootsborn as a warcraft iii custom map
legal gray zonetolerated, rarely licensed, sometimes cease-and-desisted