Seeing this at the end of 5 years anniversary stream was so good.
Highly recommend anyone that love tower defense and can tolerate the gacha aspect to play it. Beside all the awesome treatment of the devs toward their artists and communities, beautiful arts, music and animations, its story offers really sharp critique of capitalism: American prison system, American healthcare system, England oppression of Ireland,...
In the lastest main story chapter, we are shown glimpse of a growing movement of the oppressed that I feel is just a stand in for a revolutionary left movement. Here is a quote from its leader:
"He said to ignore the Infected in positions of power, because they still enjoy exploiting others with their authority and see disease as only a tool. And that we should also grant the same kind of liberation to any oppressed people, and not just our sick brethren. Because they can fight alongside us, and we'll need their strength to put up a fight. ... What we want is to send a message to all the aristocrats, and oppressors, those trying to divide, suppress, and eliminate us— The blade they so despise hangs high above their necks."
Best part of all is the stand in for France had been utterly destroyed before the game story even started 
I think only two people are explicitly gay in the game, the rest are implied (some heavily) subtext. The fans run with those subtext though, lots of good fan contents for every type of parings. Texlapp is one of most popular one for example, two mafia heiresses, one ran from their past life, the other chased after to see her failed and be dragged back into the swamp. The event that resolved their conflict was super great and brought us this banger.
Best place to look for more is under the Arknights tag on tumblr.