"achieving unlock" is grammatically incorrect (im a native English speaker), if its idiomatic then of course that's different, but I wouldn't put that down as being "fluent," id put it down to be exposed to those specific idioms. It's not just about using the verb as a noun; where is the indefinite article?

If the gp was making a "I can has cheeseburgers?" style joke, then it went over my head, but it clearly is not grammatically correct English just because its used online.