Scenarios are a new feature added in A8.
The starting settings include all of the settings from career, as well as customizable goals for completion of the scenario.
To load a scenario (either dev created, from the workshop, or your own custom scenarios), click the load button on the bottom of the scenario home screen.
Note, to use custom scenarios, the Custom Scenario Mod must be enabled.
To upload a custom scenario to the Steam Workshop, follow the instructions at ( link to be added soon ).