Help reading data from a game (Diablo II) or analyzing an image from it for text recognition

The percentile is what I’m after. I don’t currently have any plans that would need the raw values.

However, extracting the text would probably be the most accurate method (instead of trying to process the pixels of the globe, and assuming there isn’t an easy way to poll the game for information). So, if that is the case, I’m not really sure where to go from here. I’ve seen mention of Optical Character Recognition (OCR) during some searches, but it seemed pretty heavy. I was hoping there might be an easier way to do this in processing, given I know the font and size of the text. But I haven’t seen any good explanations of how to go about this.