In addition to writing Dredger and Green's Grudge War for Action, Gerry Finley-Day also specialised in creating sympathetic, honourable German characters; Hellman is the best known of these, but Sea Wolf, Fighter from the Sky, Panzer G-Man and Commando King were among his other creations.
When IPC launched 2000 AD in 1977 Finley-Day soon become one of its mainstays, writing strips such as Dan Dare, Ant Wars, Invasion!, Disaster 1990, M.A.C.H One, Fiends of the Eastern Front, Harry Twenty on the High Rock, The V.C.s and the occasional Judge Dredd story, though he is best remembered as the co-creator of the original Rogue Trooper (along with artist Dave Gibbons).
He also worked on the short-lived Tornado title, writing episodes of Black-Hawk, and on the revived Eagle, for which he worked on Saddle Tramp, Jake's Platoon, The Hand, The Collector and Sgt. Streetwise, amongst others. He disappeared from British comics in the mid 1980s, apparently after disagreements with 2000 AD's editorial team, but returned to write a one-off Rogue Trooper story in 2010.