Issue: #50 MJ
First appearances: Sludge
Creators: Rick Parker, Jose Delbo, Tom DeFalco, Bob Budiansky, Danny Bulanadi, Nel Yomtov, Dave Hunt, Don Daley
Characters: Air Raid, Blitzwing, Bumblebee, Fireflight, Octane, Optimus Prime, Powerglide, Prowl, Ratchet, Silverbolt, Skydive, Skywarp, Soundwave, Starscream, Thundercracker, Cerebros, Fortress Maximus, Weirdwolf, Bluestreak, Spike Witwicky
Story arcs: Underbase Saga