nope Both were released through the EA Partners publishing program. Shank was developed by Klei Entertainment and DeathSpank was created by Hothead Games.
The games are now available through Steam and support Steamworks features like Achievements, Steam Cloud, and Leaderboards. Like the console versions, both titles support local-only co-op.
also in development and Hothead is open to PC and Mac versions of the DeathSpank sequel "Thongs of Virtue."