Editing Retcon (section)

===In [[BattleTech]]===
* With few exceptions, the materials from Battle Technology magazines are considered non-canon.
* Other than that, the developers try very hard not to do major and blatant 180s with the canon, to the point that they try to justify/acknowledge/retool crappy stuff from that clicky game when converting them into the BattleTech proper. For anything else, they rely on the in-universe unreliability of sourcebooks to explain mini-retcons. Ex: The crappy cartoon becoming a crappy propaganda cartoon in-universe with the real events being covered in books and with a few characters migrating to BattleTech proper, most notably Adam Steiner.
* One major retcon came early on due to necessity as the game was made when the USSR hadn't collapsed yet. The retcon was that in the 80's a fictional hardliner inherits Soviet leadership instead of the real life government and this causes the USSR to survive until the 2010's, which also causes NATO to unify into the Western Alliance and after the Second Soviet Civil War's aftermath and a deal with China to reform into the Terran Alliance as the first global government, providing the initial backstory of the setting and the reasons why the colonial planets and the inner planets have longstanding enmity.
* Something that didn't affect the plot, but the artwork and designs: Long story short, there was a legal row over using artwork of licensed designs and this caused BattleTech to pull their designs while stile confirming they existed in lore, making them the Unseen. Eventually they decided "Screw it, we are retconning the appearances." and redesigned them. A summary of the affair can be seen in the [https://www.sarna.net/wiki/Unseen Unseen] page on the Sarna wiki, Battletech's main wiki.