You cannot extract or use part07.rar by itself. You must have all other parts (part01, part02, etc.) in the same folder.
If you enjoy the game, consider purchasing it on Steam . This ensures you have the latest performance updates (Icarus is known for being demanding on hardware) and supports the developers at RocketWerkz. ICARUS.v1.2.40.107990-TENOKE.part07.rar
You will not be able to access official multiplayer servers, and you won't receive automatic updates or bug fixes from the developers. You cannot extract or use part07
Downloading files from unofficial sources carries significant risks: ICARUS.v1.2.40.107990-TENOKE.part07.rar