Thanks to the work of modder James Dickinson, Gearbox's notoriously awful Aliens: Colonial Marines can now be played as something other than a form of punishment. You can imagine Dickinson's uncovered some nutty bugs in his time poring over the game, but none hold a candle to a single-letter typo that lobotomised the Xeno AI.
Dickinson wrote about the typo in late 2017 when he first discovered it, describing it as "the biggest BUG in the game":
Inside your games config file (My Document\My Games\Aliens Colonial Marines\PecanGame\Config\PecanEngine.ini) is the following line of code:
ClassRemapping=PecanGame.PecanSeqAct_AttachXenoToTether -> PecanGame.PecanSeqAct_AttachPawnToTeather
Yep, "teather" instead of "tether". According to Dickinson, the logic attached to this is rather important, allowing the AI to "[control] tactical position adjustment, patrolling and target zoning".
By simply removing the "a", the AI is transformed — it will happily flank you and "disperse [Xenos] so they aren't so grouped". Which, as you can imagine, makes a big difference.
If you ever wanted proof as to how big a shitshow ACM was, it doesn't get much better than this. [ModDB, via ResetEra]