Yyc ((full)) — Undertalemodtool

Here’s a concise guide for using with YYC (YoYo Compiler) builds of Undertale .

Most GameMaker games use the standard VM (Virtual Machine) export. In a VM export, the game’s code is stored as bytecode within the data.win file. When you run the game, the runner interprets this code on the fly. undertalemodtool yyc

Why do modders use the YYC feature in UndertaleModTool? Here’s a concise guide for using with YYC

Ensure your version of UndertaleModTool is up to date via the Bleeding Edge builds, as newer GameMaker LTS versions frequently update the YYC structure. When you run the game, the runner interprets

Increased security, as the logic is baked into the executable rather than stored as easily readable bytecode. A much more complex environment for modders to navigate. The Challenge of Modding YYC Games

The YoYo Compiler (YYC), however, translates GameMaker Language (GML) into machine-specific C++ code before compiling it into an executable. This results in: Significant performance boosts for CPU-intensive tasks.

You can often still modify global variables or object properties stored in the data file.