City of the Great Machine: Stand-In HeroesExpansion

From BoardGameGeek:

The valiant Heroes, represented in the core game, have done their best to resist the Great Machine... but alas have failed. The Stand-In Heroes continue on what their predecessors were struggling for! The Stand-In Heroes expansion adds 6 new Heroes with exceptional abilities and tactics. Each of them takes place of the corresponding Hero from the core game in their last attempt to stop the Great Machine. Limited printrun.