It’s actually very east to access the content in A New God, you just have to know where to look.
First, to gain access to the DLC content, you’ll need to check your version of the game. Find the game page for Immortals Fenyx Rising on your PC or console and look to the section that shows your Owned DLC. You’ll need the Immortals Fenyx Rising Season Pass to download A New God; it comes with the “Gold Edition” of the game, or you can purchase it separately.
Once it’s downloaded, here’s how to access the new trials.
In the lower left corner of the title screen, you’ll see a gold icon that indicates the DLC. Select it, and the title screen will change. You’ll then have options to begin a new game specific to the DLC, carrying over the skills and upgrades you unlocked from one of your save files. You can also swap back to the main game with the icon in the same location.
Again, A New God is totally separate from the main questline, even though your abilities carry over. Since it continues the storyline from the main game, you’ll probably want to finish out Immortals Fenyx Rising first. You’ll need lots of unlocks and abilities to succeed at these new trials, and it will ruin some of the twists in the story of the game’s final act if you haven’t finished it first.
That’s all there is to it. For more on Immortals Fenyx Rising and the A New God DLC, check out our game pages!