Was Tony responsible for any killings to people outside of the game or who didn't have it coming? I can't remember any, but it's been awhile.
Wiki has a full list of the people Tony was directly responsible for killing===============================
Tony has personally committed eight murders in the show. Furthermore, as a Boss, he is responsible for the deaths of others killed on his orders. The eight known murders, all explicitly presented onscreen, were:
Willie Overall, shot and killed by Tony to "make his bones" (become a made man) (1982, shown in "Remember When").
Fabian "Febby" Petrulio, strangled by Tony for ratting out members of Paulie and #####'s crew and joining the witness protection program (1999, shown in "College").
Chucky Signore, shot and killed by Tony for conspiring to kill him with Junior (1999, in "I Dream of Jeannie Cusamano").
Matthew Bevilaqua, killed by Tony and Big ##### for attempting to kill Christopher Moltisanti (Tony's protégé and cousin in-law) (2000, shown in "From Where to Eternity").
Salvatore "Big #####" Bonpensiero, executed by Tony, Silvio, and Paulie on a yacht, after they discovered that he was an FBI informant (2000), shown in "Funhouse").
Ralph Cifaretto, choked/bludgeoned to death in a fight over Ralph's supposedly killing of their prize-winning race horse "Pie-O-My" for insurance money. (2002, shown in "Whoever Did This").
Tony Blundetto, shot and killed by Tony with a shotgun for the unauthorized killings of Joe Peeps and Billy Leotardo, in order to spare him from being the subject of torture from Phil Leotardo in revenge for his brother's death (2004, shown in "All Due Respect").
Christopher Moltisanti, suffocated by Tony when after a major car accident Christopher revealed he was still using drugs (2007, shown in "Kennedy and Heidi").