If you think DLC should offer a literal game-changing experience or massive amount of new content, Wicked Isle will disappoint you. In all ways, it is of a piece with the main game. It expands the world with a relatively large new zone. It deepens or adds a new wrinkle to the base game’s lore. There are some new weapons, a handful of new enemy types and a small cast of new NPCs. If you love Atomfall’s world, fiction and mechanics, Wicked Isle is more of that, and included with the Deluxe Edition. If you were on the fence about Atomfall, Wicked Isle isn’t going to turn you into a fervent believer. Wicked Isle doesn’t do anything to hurt the main Atomfall experience, but it doesn’t do much to change or improve it, either.