RETURN
The 'SuperVar'!!
This variable is constantly used to 'return' important values, such as those in events.
EXAMPLE:
onevent GETLOADTILE
setvar RETURN <value>
endevent
In this case, RETURN, well, 'return's the load screen background number into the var RETURN, setting it to something else changes it, changing the background for the loading screen.
EXAMPLE 2:
espawn LIZTROOP
setactor[RETURN].pal 21
setactor[RETURN].extra 400
In this case, RETURN will allow you to spawn an Assault Captain [LIZTROOP, Pal 21] with 400 health instead of 60 health.