some ideas on how it could work: Required scripts are saved as a different type of script: modules, with a new compiler option: compile to "SLua scriopt" or to "Slua module". Modules are executed when required and return a value, with a return statement, for instance a table with functions and constants. Scripts call modules as myModule = require("Module name") , the returned value is assigned to the variable myModule , using the script's memory space. The module must be in the object contents with the script that requires it. If the module is not in the object, its running state is disabled, or it doesn't return a value, require() will return nil. Once it returns, the module is removed from memory and its variables are garbage-collected. Modules are executed synchronously, the main script is paused until the module returns. Modules don't receive events, any events that arrive while the module is executing are queued in the main script. Modules can't require other modules, only scripts can use require() .
