The cheapest graphics card you can play it on is an NVIDIA GeForce 7200 GS. But, according to the developers the recommended graphics card is an NVIDIA GeForce 8500 GT. An Intel Core 2 Duo U7600 CPU is required at a minimum to run Blocksworld. However, the developers recommend a CPU greater or equal to an Intel Core i5-650 to play the game. You will need at least 2 GB of free disk space to install Blocksworld. Blocksworld system requirements state that you will need at least 3 GB of RAM. Additionally, the game developers recommend somewhere around 4 GB of RAM in your system.
Blocksworld will run on PC system with Windows Vista or 7 and upwards. Additionally it has a Mac version.
