Autosave
From ZDoom Wiki
15:Autosave (No parameters required)
Usage
Automatically saves the game to an autosave slot.
Examples
Usually this is set on a line making sure not to set it to be repeatable. If you were to be generous, you could set up a safety script like this:
script 10 (void)
{
if (GetActorProperty(0, APROP_HEALTH) > 10)
Autosave();
}
This sort of script will prevent the game from saving when the player's health is too low, as it can be considered annoying to overwrite a previous save when the player is in a dire situation.

