What is stellaris the worm?

Unfortunately, as an AI language model, I cannot accurately provide information about "Stellaris: The Worm" as the term seems to be inaccurate or incomplete. However, I can provide some basic information about Stellaris, a popular science-fiction strategy video game developed and published by Paradox Interactive. Stellaris features a complex and detailed gameplay that involves empire building, exploration, negotiation, diplomacy, and warfare set in a vast and procedurally generated universe. The game has various expansion packs, mods, and DLCs that enhance the gameplay and offer new challenges and experiences for players. It is praised for its massive scale, impressive graphics, and attention to detail.