Although I do play the game, I only read the story up to season 1 and basically skipped the story from that point on. However I understood everything perfectly regarding what the viewer is supposed to know from this episode so it wasn't really that confusing. Honestly, it's pretty easy to understand from just reading the subtitles and using context clues. I haven't played through Darknights Memoir but for the anime-onlys, this episode gave the viewer all the information they needed.