Cy Dethan 
The Indifference Engine 2 
The SuicideShow

A suburban slacker turned one-man genocide is blackmailed into slaughtering his way through a web of interconnected parallel realities, destroying every single alternate version of himself. Frustrated and desperate, everything changes when one of his targets unwittingly presents a possible way out. It’s his only chance of freedom, and all it will cost him is the future.