The system requirements for Euro Truck Simulator 1 (released in 2008) are extremely modest by modern standards. Because of its age, it can run on almost any modern computer, including those with integrated graphics Minimum System Requirements These specs are designed to get the game running on older Windows XP systems [1]. Windows XP or Windows Vista [1, 2]. Processor: 2.4 GHz Intel Pentium 4 or equivalent [1, 3]. 512 MB RAM (1 GB required for Windows Vista) [1, 9].
These are the specs the developer listed at launch. Keep in mind they target and DirectX 9 . euro truck simulator 1 system requirements
Here is the compatibility status for current OS versions: The system requirements for Euro Truck Simulator 1