Deponia Doomsday follows Rufus after a nightmare in which Deponia is destroyed and he grows a mustache. Unsure whether those events were only a dream, he sets out to prevent them, aided by McChronicle, a temporal scientist who has discovered strange time anomalies. The setup pairs the series’ chaotic anti-hero with a threat tied to time travel and the fate of the junk planet.
The adventure’s time-bending premise is reflected in its stated ability to turn back time and reveal a new spin on Deponia’s history. Its story moves through playable levels on both Deponia and Elysium, bringing junk and decadence together in a setting rendered in a hand-drawn comic style. Familiar faces share the cast with more than 70 new characters, while the game’s description also highlights bizarre humor and platypus-themed action.
As a single-player adventure, Deponia Doomsday is designed around one player following Rufus through its comic world, story, and time anomalies rather than sharing a session with others. The store listing also identifies it as an adventure game and includes Steam achievements and trading cards.