The cheapest graphics card you can play it on is an NVIDIA GeForce GTX 560. But, according to the developers the recommended graphics card is an NVIDIA GeForce GTX 660 Ti. To play CountDown you will need a minimum CPU equivalent to an Intel Pentium 4 2.00GHz. However, the developers recommend a CPU greater or equal to an Intel Core i5-650 to play the game. CountDown 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. In terms of game file size, you will need at least 300 MB of free disk space available.
CountDown will run on PC system with Windows 7/8/10 and upwards.