These decks (included in my production card collection) have been mined from older video games, and in addition to cloze sentences and word definitions in both Japanese and English, feature images from the games with the target words blurred out with a mosaic filter on the front, and the unblurred images on the back. The images are kept in their original low resolution for minimizing file size, being resized by the card formatting for better visibility. Only Japanese definitions are shown by default on the front, but English definitions can be revealed below them by clicking the hint labeled EngMeaning. English translations of whole sentences are not included, but if someone is willing to import sentences from the English localization of a game, I wouldn't be opposed to including that information in the "OfficialEng" field that I've already prepared for such a purpose.
In addition to the games pictured below, there are also decks for Rockman X and Rockman X3. The Rockman games as well as Shubibinman Zero are written in kana only, which might be helpful to note when guessing at the answers.
While I'd recommend playing each game first before attempting its flashcards, in the case that you haven't played or don't remember the game content and would like more context for a particular sentence, clicking on the PreviousLineImage or PreviousLineText hints (if available) will reveal those fields, which contain the immediately preceding lines in the game.
Legend of Zelda: Triforce of the Gods (Link's Awakening)
Legend of Zelda: Triforce of the Gods (Link's Awakening)
Demon's Blazon (Demon's Crest)
Demon's Blazon (Demon's Crest)
Castlevania: Aria of Sorrow
Castlevania: Aria of Sorrow
Metroid: Fusion
Metroid: Fusion
Metroid: Zero Mission
Metroid: Zero Mission
Rockman X2
Rockman X2
Shubibinman Zero
Shubibinman Zero