Grant and artist Mike Zeck produced a Punisher limited series in 1986[5] and an original hardcover graphic novel of the character three years later.
He wrote a one-shot featuring an updated version of his character Whisper and created a crime series, 2 Guns, about undercover cops, for Boom!
At Avatar Press, he produced two creator-owned mini-series, Mortal Souls and My Flesh Is Cool, as well as adapted Frank Miller's original Robocop screenplays to comics format, which deviated considerably from the filmed versions.
Grant's 2 Guns has been made into a major motion picture from Universal Studios starring Denzel Washington, Mark Wahlberg, Bill Paxton and Paula Patton.
[10] Grant is working on the sequel to 2 Guns as well as an updating of Gil Kane's classic spy thriller His Name Is... Savage[citation needed]