Microsoft and World's Edge have published a detailed Steam news post for Age of Mythology: Retold - Obsidian Mirror, outlining what players can expect before the expansion launches on April 21. The update positions Obsidian Mirror as a major systems-and-content drop rather than a small god pack, with a new Aztec pantheon, fresh mechanics, and a full campaign at the center of the pitch.

The headline addition is the Aztec pantheon itself. The Steam post says Obsidian Mirror adds 3 new Major Gods and 9 new Minor Gods, with Quetzalcoatl, Tezcatlipoca, and Huitzilopochtli leading the expansion's top-tier choices. Those additions are tied to a new Fear and Illusion gameplay layer, which introduces traps, enemy manipulation, and battlefield control tools built around sacrifice and divine pressure rather than just raw front-line stats.

Another key system is Tonalli, described as a life-force resource released in battle. According to the post, fallen warriors generate Tonalli that can be converted into divine Favor, and even villagers can offer life force when players want more power. That design choice matters because it gives the Aztec faction a clear identity beyond cosmetic mythology. Obsidian Mirror is trying to make sacrifice, momentum, and risk-reward economy part of the faction's play pattern, not just part of its lore text.

The content scope goes beyond skirmish tools. Obsidian Mirror also adds a 12-mission campaign built around conflict between sibling deities, beginning with the fall of Aztlan and expanding into a cross-continental struggle shaped by alliances, betrayal, and returning divine rivals. For strategy players who wanted the DLC to offer both competitive systems and authored single-player content, that is probably the most important part of the announcement.

Steam pre-orders are already open with a limited-time 15% discount, and Expansion Pass owners will receive the DLC at launch on April 21. Taken together, the message is clear: Obsidian Mirror is being sold as one of the first truly identity-defining expansions for Retold, with enough mechanical and narrative weight to matter whether you care most about build experimentation, mythic faction design, or a new campaign to learn the faction from the ground up.

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Age of Mythology: Retold Details Obsidian Mirror Ahead of April 21 Launch