The game seems to struggle when there are a large number of units for me. All units stop firing even though the firing sound continues, and then the game eventually catches up with itself and damage starts happening. Was on around wave 40 of endless with 8 puckle guns 100 green jackets and 20 red jackets though, so lots of stuff for the game to be thinking about :P
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 "Master of Fortresses"){kind=icon}