Mistakes happen, and sometimes players come up with situations the BattleTech designers, writers and testers never imagined. If you believe you’ve found a problem, report it in the appropriate thread on our forum. If you want to see what errata we have issued, here is all official errata issued for our products.

Catalyst rolls in any approved errata every time a product is reprinted.

Errata last updated 16 July, 2015.


Core Rule Books


Total Warfare Errata version 4.2

This PDF is 513KB.




TechManual Errata version 3.02 – General Changes

This PDF is 1,035KB.

In addition, there are two other downloads for TechManual. The first replaces pages 302-314 as well as page 319, the second replaces pages 349-352.

TechManual Errata version 3.0 – Battle Value (August 2014)
TechManual Errata version 3.0 – Infantry Weapon Tables (April 2013)


Tactical Operations Errata version 3.4

This PDF is 848KB.

In addition, there is one other download for Tactical Operations, which adds landing modifiers for the various types of special terrain found in that book.

Tactical Operations Landing Modifiers


Strategic Operations Errata version 2.0

This PDF is 606KB.




A Time of War Errata version 2.02

This PDF is 158KB.




Alpha Strike Errata version 2.1

This PDF is 401KB.