Disable saving

[The chaser]

There is a roundabout method of using save points in a custom story. Put an Examine area around the save point, and have a script that runs when you interact with it to set a local variable to a certain number. Then have a script in your OnEnter section that checks which number the variable is set at then transports the player to a PlayerStart located at the appropriate save point.

Very roundabout, but it would work. Better to just do a FC though.

He is searching for a way that players can't save in any way (A justine type CS, I guess).