Colditz is a German mercenary.
Colditz was later hired by Doctor X to set up a fake separatist uprising in Guernsey, which was apparently foiled by Action Man. Colditz soon met with Storm Shadow, who told him nobody bore him ill will about Guernsey and invited him to Doctor X's Chateau. After the ninja disappeared, Action Man, who was spying on the two's conversation, leap into battle with Colditz. The mercenary held his own, till Action Man forced him into a pool, causing a device he planted on him to electrocute Colditz and take him out of commission.
Colditz was taken into Action Man Programme custody and Action Man was sent disguised as Colditz to infiltrate the Chateau. His failure to recognize the doorman, Colditz's former lover, set off the alarms and blew his cover.
After somehow being freed from custody, Colditz was brought along by Garrison Kreiger on the Iron Ring's assault on Cybertron. Rather than participating in the main assault, however, Colditz was given the mission of capturing Kreiger's former ally Centurion dead or alive. Climbing the tower he was being held in with a grappling hook, Colditz found that his target was being defended by Garrison Blackrock. The bounty hunter didn't have to lift a finger to take down the Titan Master, however, as Centurion revealed he hadn't gone over to the side of angels after all and blasted his guardian in the back.