Leviathan: The Last Day of the Decade

In a world ravaged by a pandemic and ruled by the undead Plague King, five noble families hold power. You follow a young man whose search for justice for his mother's murder leads toward a suspect protected by wealth and influence—and bound to him by personal ties.

Travel through city locations, examine surroundings, speak with residents, and gather information and useful objects as you pursue the mystery. Conversations and character relationships reveal motives and complications along the way.

The story unfolds across five episodes, combining visual-novel dialogue with point-and-click exploration and occasional puzzles. Choices and relationships feature in the narrative, while the investigation develops alongside political conflicts and supernatural events.

Reviewers who enjoyed the game often praise its dark, distinctive setting, visual style, and the mystery and dialogue in its earlier episodes. Several also describe the story as losing coherence or feeling unfinished near the end; opinions on the music and the impact of choices are mixed or critical.