Raging Onslaught [ST12] is a ready-to-play red and purple starter deck for the Gundam Card Game, built around Mobile Suits that excel at close-range combat. Gundam Epyon anchors a roster drawn from Gundam Wing: Endless Waltz, Mobile Fighter G Gundam, Mobile Suit Gundam 00, Gundam Unicorn, the original Mobile Suit Gundam, Gundam SEED Destiny, and GQuuuuuuX.

The box contains one 50-card deck, 10 Resource Cards, 2 Token Cards, 1 paper damage counter, 1 bonus pack containing a single card, and a rule and play sheet. Everything needed for one player is included, so two starter decks are enough for two people to sit down and play.

The deck pushes forward aggressively, trading resources to keep pressure on the opposing shield area. Alongside standard one-on-one play, it carries a number of cards written for the game's multiplayer formats, including Battle Royale and 2vs2.