In Kinfire Delve: Callous' Lab, a tactical and cooperative card game for 1-2 players, you must traverse a deck of challenges to reach Callous, the Well Master, and face him in an epic final battle.

Callous' well is made up of four Challenge cards, with Callous himself at its center. When one Challenge is defeated, another replaces it, with the deck comprising a total of 57 Challenge cards. During your exploration of the well, you can only play a skill card from your hand if it matches the color of the current challenge, for example, a red challenge requires a red skill card. Some cards have two suits, and others are white, i.e. jokers. If the map you played doesn't allow you to defeat the challenge, you can add progress points to it and try again, but you may incur a penalty in return.

Other Seekers can help you by playing one of their cards as a backup, but be careful: depleting your hand forces you to take an exhaustion card before you can draw again. These exhaustion cards are always harmful, but some are even more so than others.

Overcoming a challenge gives you a reward, such as regaining health or progressing through the well by discarding unrevealed Challenge cards. Once you reach the bottom of the well, the final showdown against Callous awaits you. All Seekers share a single health pool, and if it reaches zero, you are defeated.

This game requires teamwork and perseverance, as Atios' wells are as unpredictable as they are dangerous.