As a long time Batman-liker, I'm going to be honest and say that the Arkham series reveals some of the uglier features of the Batman franchise writ-large, seemingly by accident. You know any game with the premise "check out this spooky INSANE asylum!" is going to be bad news, but...I mean, you could write a full novel on Arkham Asylum's portrayal of mental illness. Arkham's inmates are always either screaming, giggling, or murdering. Their caretakers treat them like animals, and the game just about encourages us to do the same. It's full on 1950s pulp schlock. This game makes the Outlast series look like The Titicut Follies.
And then there's the bizarre disparity in harsh language between Harley Quinn and every other character in the game. I punched a man into a bursting electric panel, a man whose scalp was literally stapled onto his head, and the best insult he could croak out at me was, like, "You're a Bat-Idiot," but Commissioner Jim Gordon's over here pulling out "crazy bitch" at the only female character of consequence in the entire game. In fact, so does Quincy Sharp, the asylum warden? And some of the other inmates? Everyone is constantly screaming at Harley Quinn.
My point is, Arkham Asylum is, unfortunately, one more Problematic-in-retrospect title from the late-aughts. If you can find the patience to overlook its obviously juvenile perspective, it's still an elegant mixture of loose yet hyper-satisfying stealth mechanics, the best beat 'em up combat in the business and some terrific Batman window dressing. Maybe just, uh, skip a cutscene here and there.
I think my favorite thing about Arkham Asylum in relation to its sequels is the fact that it lets you comprehensively understand a single space. Something was lost in the transition from Asylum to the bloat of Arkham City. I like the idea of watching a setting crumble and shatter along with its bruising protagonist. It gives you an escalated sense of consequence in a story that would otherwise be fairly trite.