Top Critic Average
Developer: Paradox Development Studio
Publisher: Paradox Interactive
Genres: Simulation, Strategy
Stellaris: Leviathans Release Trailer
If you're going to charge big for DLC, you better deliver big. Leviathans has content, but it's locked behind dozens of hours of standard playthrough. It does make small, indiscernible improvements to the base game but you can, and should, wait for a sale and pick it up then.