Holy shit it's finally over. Good god Interloper was a slog, for a fan remake Black Mesa was 10/10, at least until reaching Xen. They found a way to make that part worse somehow.
I have to admit I liked the Nihilanth fight in BM more, but they butchered his design. He looks like a big baby here, in the original he was some lovecraftian mess and had Vortigaunt parts and machinery stapled to him. He was more mysterious and creepy.