The Transformers: Robots in Disguise » 6 issues
Volume » Published by IDW Publishing. Started in 1998.
Hardhead appears in 6 issues in this volume.
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Issue #6
Syndromica (1)
June 1, 2012
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Issue #10
Syndromica (2)
October 1, 2012
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Issue #19
Dark Cybertron Prelude; Homecoming
July 2013
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Issue #23
"Winners & Losers" Dark Cybertron Chapter 3
November 2013
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Issue #24
Finest Hour: Dark Cybertron Chapter 5
December 2013
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Issue #27
Black Planet: Dark Cybertron Chapter 11
March 2014
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