Global variables and Local Map variables.

[palistov]

Haha what? Memory leak? The variables are stored in the .sav file, as far as I can detect. They're probably read from the save file and stored in memory, then the opposite happens when the game is saved and closed.

As far as the variables go though, just refrain from using global variables if you plan on making a custom story that isn't a one-map deal kind of like 24-hour Amnesia's maps were, or something similar to my Holiday Series maps.