Citations:total conversion mod

Noun: "(video games) a mod that uses the game engine of an existing video game but significantly alters gameplay, assets, setting, etc. [...]"

 * 2003, Dan Pinchbeck, Doom: Scarydarkfast, page 123:
 * Alongside Fisher's Aliens TC, the first DOOM total conversion and therefore the world's first total conversion mod, other existing intellectual properties were quickly reinvented as DOOM mods.
 * 2003, Katie Salen Tekinbas & Eric Zimmerman, Rules of Play: Game Design Fundamentals, unnumbered page:
 * Elemental is what is known as a “total conversion” mod: rather than simply inventing a new character skin, game level, or in-game object, the mod transforms Dungeon Siege into a completely different game.
 * 2006, William Abner, The 2006 Gamer's Tome of Ultimate Wisdom: An Almanac of Pimps, Orcs, and Lightsabers, page 157:
 * This is a total conversion mod for Medieval: Total War that uses Napoleonic era troops rather than swords and knights.
 * 2008, James Newman, Playing with Videogames, page 169:
 * CounterStrike originated as a Total Conversion mod for Valve's Half-Life.
 * 2010, Satish Nambisan & Mohanbir Sawhney, The Global Brain: Your Roadmap for Innovating Faster and Smarter in a Networked World, page 159:
 * The best-known total conversion mod of Half-Life is Counter Strike, which uses the Half Life engine but is a multiplayer-only game.
 * 2012, Casper Harteveld, Making Sense of Virtual Risks: A Quasi-Experimental Investigation Into Game-Based Training, page 11:
 * In the end, the two created in less than a month a total conversion mod of Unreal Tournament 2004 in which players wander around an authentic Dutch landscape (without any guns of course).
 * 2013, Graeme Kirkpatrick, Computer Games and the Social Imaginary, unnumbered page:
 * Although modding is not limited in principle in its scope, the 'total conversion mod ' that effects a profound transformation of the game engine, like the famous conversion of Half-Life (1998) from a single-player game to the multi-player Counter-strike (1999), is now extremely rare (Nieborg and van der Graaf 2008:187), for reasons described above.
 * 2013, Josef Köstlbauer, "The Strange Attraction of Simulation: Realism, Authenticity, Virtuality", in Playing with the Past: Digital Games and the Simulation of History (eds. Andrew B.R. Elliott & Matthew Wilhelm Kapell), page 171:
 * Recently a total conversion mod called Day Z turned the ArmA 2 expansion "ArmA 2: Operation Arrowhead" into an open-world zombie survival game.