Bound by Flame allows players to fully customize their character, from gender to facial features, impacting the demon's appearance. The game presents various chapters with quests intertwined in a primary adventure, offering diverse scenarios based on player choices and demon influence. Crafting plays a significant role, enabling players to create and enhance equipment, including armor and weapons. Companions join the journey, forming relationships based on player actions, be it friendship, romance, or rivalry.

The customization extends to weapons and armor, allowing detailed modifications like changing sword blades and hilts separately, affecting not only aesthetics but also attributes such as crit and speed bonuses. Combat in Bound by Flame offers three distinct styles - heavy, slow strikes with axes, quick strikes with daggers, and fire attacks for massive damage, each with its own skill tree of passive and active abilities. Players can employ various tactics during battles, utilizing crossbows, traps, and earned abilities for strategic advantage.