Goodbye Deponia is the third and final part of the Deponia trilogy, continuing directly from where Chaos on Deponia ended. The player takes control of Rufus, an egocentric inventor with little regard for those around him, who wants to escape the garbage dump planet Deponia and fight against the Organon authorities.
The gameplay follows a similar structure to the first part, but changes in the second half. Rufus produces two clones of himself, allowing each to solve their own puzzles in separate scenarios. The player can switch characters freely and exchange items, depending on the progress of the protagonists. Puzzles include inventory-based, dialogue, and logic challenges, with help functions such as a hot spot button and the ability to skip logic puzzles.