If you tire of killing, if that's possible, GameWorks offers all sorts of other entertaining cyber realms. And yes, there are numerous nonviolent games for children if you're some sort of daisy-pickin' pacifist.
After a hard day of killing, you can retire to GameWorks' full bar and a menu of mostly excellent food. The upstairs restaurant and pub makes a nice place to hide from children asking for more money.
To stem the high cost of killing, GameWorks offers daily specials as well as reduced pricing for bulk-killing. Now, if they could only pipe in the smell of napalm in the morning.