Notably, Liberty does not have direct access to the Border Worlds, being buffered by the other major Houses and the Independent Worlds. The Sigma systems connect Kusari to Rheinland, the Omega systems lie between Rheinland and Bretonia, and the Tau systems occupy the space between Bretonia and Kusari. These worlds ring the major House territories, providing needed materials for the Houses as well as transit between the outer Houses and to the Edge Worlds. The Bering and Hudson systems, separating Liberty and Rheinland, have higher-level encounters. Notably, the Cortez and Magellan systems, dividing Liberty and Bretonia space, are less difficult. All have trade lanes and jump gates to connect the Houses, and some have bases and way stations, but the level of development is almost universally less than in the House systems, and the level of criminal activity almost universally higher. These systems lie between Liberty and the other major Houses.

Please note that on in-game experience, which is more relevant to the player and does not contain all of the spaces properly which results in incorrect attachement of some Edge Worlds' Systems. The following is a list of the systems found in each region of space. The Sirius Sector is divided into several regions, each one subdivided into several star systems. This map is the most accurate available representation of the Sirius Sector as experienced in the unmodified version of Freelancer. As these 'story mode' systems are not shown on any in-game map the map shown to the right is not 100% accurate, and instead provides an approximation of what is experienced during the game. It is worth noting that there are several systems only accessible in the Single Player Plot that share the same name. To six of the systems there is no connection except beam commands inside the storyline mission scripts. There are 49 known Star systems inside the Sirius Sector and 53 total systems.

Freelancer discovery 4.88 map