Unofficially it has always been the stance pretty much from the Alpha. If you looked at the original single player missions, you start doing some jobs for a 'dodgy' Imperial corporation and a few missions in you are killing Federal fighters. Much more has been said about the Empire than all other factions combined. We've probably heard more about the Thargoids than the Alliance. To be honest I was surprised that the Damocles video ended with a Federation victory given the Imperial bias, but Michael Brookes gave it the spin that the Imperial ship wasn't part of the Imperial navy.
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We can argue aesthetics about the clipper and dropship but the original pricing and capabilities clearly favoured the Imperial side (that being said I find NPC dropships slightly more challenging than NPC clippers).
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Current state of play there is absolutely no reason to support the Alliance as it seems to be considered irrelevant to the point of almost being a joke. The Federation are now cast as incompetent authoritarian bureaucratic killjoys at best and heartless murderers at worst. Given the potential fault lines in the Empire, even anti-slavers can play Imperial in good conscience.
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We can argue aesthetics about the clipper and dropship but the original pricing and capabilities clearly favoured the Imperial side (that being said I find NPC dropships slightly more challenging than NPC clippers).
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Current state of play there is absolutely no reason to support the Alliance as it seems to be considered irrelevant to the point of almost being a joke. The Federation are now cast as incompetent authoritarian bureaucratic killjoys at best and heartless murderers at worst. Given the potential fault lines in the Empire, even anti-slavers can play Imperial in good conscience.