In terms of game file size, you will need at least 620 MB of free disk space available. The cheapest graphics card you can play it on is an AMD Radeon HD 7850. Dummy! system requirements state that you will need at least 6 GB of RAM. To play Dummy! you will need a minimum CPU equivalent to an Intel Core i3-4340.
Dummy! will run on PC system with 64-bit Windows 7, Windows 8.1, Windows 10 and upwards.