An Intel Core i3-530 CPU is required at a minimum to run Rift Keeper. However, the developers recommend a CPU greater or equal to an Intel Core i5-650 to play the game. In terms of game file size, you will need at least 2 GB of free disk space available. Rift Keeper system requirements state that you will need at least 2 GB of RAM. Additionally, the game developers recommend somewhere around 4 GB of RAM in your system. The cheapest graphics card you can play it on is an NVIDIA GeForce GTX 460. But, according to the developers the recommended graphics card is an NVIDIA GeForce GTX 560.
Rift Keeper will run on PC system with Windows 7 and upwards.