Events are the missions and actions are what you do in missions. That is an example. obj_char_create_1 Executes the command inside when the object is created in the room. If theres action_message("Hello Y'all"); script in Create event and if you place this object to the main room (first room on the Rooms list), you will get a message box saying Hello Y'all when you start your game. Other events: * Step: the game loop (every frame these actions are executed) * Alarm>Alarm x: triggered when Alarm x is going off * Draw: customize the drawing that GameMaker does