An Intel Core i5-4590 CPU is required at a minimum to run Sacred Four. Sacred Four system requirements state that you will need at least 8 GB of RAM. Provided that you have at least an NVIDIA GeForce GTX 970 graphics card you can play the game. In terms of game file size, you will need at least 2 GB of free disk space available.
Sacred Four will run on PC system with 7/8/10 and upwards.