Building on the critical and commercial success of the BattleMech Manual, a half-year of public playtesting brought forth the most cohesive, approachable, and dynamic set of rules for BattleTech ever: the new Core Rulebook. Thanks to the support of the Catalyst Demo Team Agents and the wider BattleTech community, the Core Rulebook also contains a comprehensive Missions section: a shared, fundamental framework allowing players to easily create a huge variety of BattleTech games. This flexible toolbox allows for everything from quick pick-up games to epic clashes, and makes it easy for anyone—from the newest players to grizzled veterans—to build a force, choose a mission, grab some miniatures and start rolling dice! Core Rules Changes After six months, five playtest packets, and thousands of hours of playtesting, we’ve finalized the BattleTech Core Rules Changes document, which you can find here, alongside a review and reflection on this process from developer Keith Hann. We can’t thank our fabulous, worldwide community enough for their expertise, enthusiasm, and time as we developed this new rulebook and box sets. Thank you! As always, existing BattleTech mapsheets, Technical Readouts, and all models remain fully compatible with the new Core Rulebook. Additionally, of the thousands of ’Mech record sheet variants published over the past forty years, less than .05% required a small tweak (just those for units which have Watchdog CEWS or Bombast Lasers). Odds are that you’ll never see an existing record sheet that’s not fully compatible. For the first time in more than thirty years, a new BattleTech Starter Box, Core Box and Core Rulebook were developed simultaneously for a joint release in August 2026. In preparation for this refit, Catalyst ran the largest public playtest in BattleTech’s four-decade history, ensuring all revisions to our game of heavy metal mayhem were well-honed and battle-tested. While rules changes were made to improve the tabletop experience, this is not a new edition of BattleTech. As always, BattleTech remains remarkably the same as when it first appeared in 1985’s Second Edition boxed set.
