G.I.Joe vs Transformers Vol.1 #1-6 (2003) Complete

G.I. Joe vs. the Transformers was the first G.I. Joe/Transformers crossover published by Devil's Due, interestingly while the Transformers comic license was with Dreamwave Productions at the time. It established a new Devil's Due crossover continuity.

G.I. Joe vs. the Transformers opens with Cobra finding the buried Ark and the inert Transformers within. Cobra reformats the Transformers—Autobot and Decepticon—into traditional Cobra war machines and forces them to do Cobra Commander's bidding. When the Transformers break free of Cobra's control, all hell breaks loose…

Several major Transformers and G.I. Joe characters die in the course of the story, a facet of the storyline's tendency to play fast and loose with its source material. Pulp hero moments such as Optimus Prime's revival also began to establish the series' reputation as a fun and occasionally silly collection of stories.

The series spawned three sequels (as of 2007), though the concept of the Transformers with Cobra vehicle modes was dropped after the first one.