Build gameplay mods for a single-player game without knowing how to code

A Redditor wanted features in Middle-earth: Shadow of War (2017) that the developers never added and that other modders had called impossible. Not wanting to learn to code, they used Google's Antigravity agentic coding tool with Gemini 4 models (Argon and Carbon) to write the mods, then playtested them in the game for days. They call the result a personal director's cut of the game.

Over a few weeks they built and released several mods, including armor transmog, a change that brings Nemesis enemies back, and expanded Nazgul powers. The mods are published on their Nexus Mods profile. They estimate that doing it the old way would have taken nights of work per mod. The post gives no detail on failed attempts or cost.

The post is light on how the agent worked with the game files, so expect your own trial and error. Playtesting took days and stayed manual. Some commenters were hostile to AI-made game content, so expect a mixed reception if you publish.