You will need at least 110 MB of free disk space to install Passage 4. The cheapest graphics card you can play it on is an NVIDIA GeForce 510. Passage 4 system requirements state that you will need at least 128 MB of RAM. An Intel Pentium 4 2.00GHz CPU is required at a minimum to run Passage 4.
Passage 4 will run on PC system with Windows 2000/XP/Vista/7/8/10 and upwards. Additionally it has Mac and Linux versions.