Apparently there is a typo in the .ini file that significantly weakens the ai. If you fix this typo.....
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https://www.engadget.com/2018/07/13/aliens-colonial-marines-typo-ai/
In a nut shell change teather to tether in PecanEngine.ini
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https://www.engadget.com/2018/07/13/aliens-colonial-marines-typo-ai/
In a nut shell change teather to tether in PecanEngine.ini