"Choose your hero and defeat the guardians of the Sanctora Mountain, as you attempt to reach the mountaintop and dethrone Abidan, a ruthless demigod cult leader. In a familiar rogue-lite manner, dying is part of progression, granting you new game mechanics, playable characters, skills, and weapons."

Heretical is a singleplayer Rogue-lite Action RPG with Soulslike elements made for PC and published through the Steam platform. Set in a medieval fantasy world where dying is part of the progression, Heretical's deep RPG mechanics, engaging narrative, and countless custom character builds, provide a unique playing experience with each new run.

The main gameplay feature of Heretical is that the players lose all of their experience points, earned XP levels, items, weapons, and skills once they're defeated by numerous enemies in the world. However, being a Rogue-lite game, the players keep the progress of the Prophecies they're fulfilling, as well as all of the unlocked player characters, skill slots, Well of Stars upgrades, available skills, unique weapons, NPC interactions, and world shortcuts.

As an ultimate test of player skills, the boss fights pit the players against many powerful enemies that stand in the way of their progress through the world of Aelyndor.