According to Hans Ruin, there are two ways to approach the examination of freedom in Heidegger’s writings: One can use the notion of freedom as a heuristic concept to interpret the entirety of Heidegger’s work as a philosophy of freedom, which was famously done by Günter Figal, or one can reconstruct Heidegger’s actual use of the notion of freedom. In my paper I’ll focus on the second approach and show that although “freedom” or, rather, “being-free” can already be found in Being and Time, his more elaborate concept of freedom as transcendence is developed in the years 1928-1930. These years are part of a time period in which Heidegger tried to develop his own positive concept of metaphysics. The main texts which show this development are the lecture course The Metaphysical Foundations of Logic and the essay On the Essence of Ground. Based on Aristotle’s twofold metaphysics—consisting of ontology and philosophical theology—Heidegger sketches his own concept of metaphysics. The fundamental ontology which plays the role of ontology is complemented by his cosmological interpretation of theology: metontology. Together, they form Heidegger’s novel notion of metaphysics: the metaphysics of Dasein. Whereas fundamental ontology is concerned with the question of Being, the main subject of metontology is world as beings as a whole. Heidegger develops his concept of transcendence, i.e., metontological freedom, which describes the connection between freedom and world, on the basis of the terms world-projection (Weltentwurf), world-view (Weltanschauung), and world-formation (Weltbildung), each describing an aspect of transcendence.