code/__defines/subsystems.dm 
| RUNLEVELS_DEFAULT | default runlevels for most subsystems |
|---|---|
| RUNLEVELS_ALL | all valid runlevels - subsystems with this will run all the time after their MC init stage. |
Define Details
RUNLEVELS_ALL 
all valid runlevels - subsystems with this will run all the time after their MC init stage.
RUNLEVELS_DEFAULT 
default runlevels for most subsystems