The cheapest graphics card you can play it on is an NVIDIA GeForce GTX 970. In terms of game file size, you will need at least 200 MB of free disk space available. An Intel Core i5-4590 CPU is required at a minimum to run King Kaiju. King Kaiju system requirements state that you will need at least 4 GB of RAM.
King Kaiju will run on PC system with 64 bit Windows 7 SP1, Windows 8.1 or Windows 10 and upwards.