The Devil Card

The Devil Card is a solo card battle game played on a 3×3 grid, inspired by Final Fantasy VIII’s Triple Triad. You choose five cards from your collection for each match, then take turns placing them on the grid. Each card has four numeric values, one on each side; when it borders an opponent’s card, the touching values are compared, and the opponent’s card flips to your side if your value is higher.

Win cards and expand your deck

Each battle lasts two rounds, with all nine grid cells filled in each round. The side controlling the most cells at the end wins the round. A drawn round is replayed without awarding a win. Win both rounds to choose one card from your opponent’s deck and add it permanently to your collection. Across the campaign, these gains expand your deck and open up more strategic options. There are over 300 unique cards to collect, and completing the collection may take multiple battles and careful choices.

Campaign

The linear campaign pits you against 25 unique opponents, each with their own set of rules. You adapt your strategy as you learn the rules and face tougher challenges. Your goal is to defeat the Devil, earn his soul card and complete the campaign.

Battle rules

Opponents use different combinations of rules, which are shown before each match. The game includes:

• Open: all cards are visible from the start.
• Random: card positions are shuffled at the beginning of each round.
• Mirror: cards with the same values touching each other are flipped.
• Plus: cards are flipped when the sum of adjacent values matches another sum on the board.
• Combo: flipped cards can trigger further flips in chain reactions.
• MirrorWalls: works like Mirror, but the board edges act as walls.
• Elemental: card types have strengths and weaknesses that affect flips.

Freeplay

Freeplay lets you battle with all cards unlocked in the campaign and freely configure the rules. It does not affect story progress, and can be used to test strategies, experiment with rule combinations or play at your own pace. The game also has no card loss: your collection grows with every win.