Trismegistus is the second full-length English fan game made with Sword of Moonlight: The King´s Field Making Tool. The game is a real-time first-person perspective mystery/action-puzzle game with RPG elements such as gaining levels and using spells.

Your character, a heroine alchemist, is plunged into an in-depth unknown world full of secret locations and mystical artifacts, in an attempt to make light of the strange disappearance of the king. Applying relics, traversing multiple dimensions, communicating with strange beings, and gaining magic ability and intellect, she will all but discover truth in its entire horror.