Hi,
This is not possible without writing a proper serialization framework for this.
you'll need to define what can be saved, and create a way to save this informations into a text file ( can be binary, or plain text, like xml or json for example), then you need a mechanism to save and load this data.
This is definitly amongst the hardests thing to achieve in Unity by nature, so you should carefully plan for what you need exactly, don't go for a totally generic way, you'll get lost if you have no proper experience as a core programmer.
you'll find may assets on the asset store for serialization in game, mainly for saving game states, which is essentially what you are after.
The closest feature you shoudl use to achieve this in PlayMaker is DataMaker/XmlMaker which will allow you to load/save read/write Xml at runtime, but again, this is very advanced stuff in your case
If you have more specific questions, let me know.
Bye,
Jean
Bye,
Jean