Nanowish is a free expansion via patch (V 1.5.0.0), and is available to everyone who owns The Demon Rush: Legends Corrupt.
The Nanowish expansion not only adds the final new playable character, Subwoofer, but also adds a large amount of story content to Story Mode (including the final Arena Challenges), alongside 5 new Side Stories. Subwoofer's addition to Prison Break also deserves special mention, as his inclusion in a party acts as a high difficulty version of Prison Break.
Work on the final expansion, Scorched Earth, will begin immediately and it will be an entirely story-based expansion.