Gridworld system requirements state that you will need at least 8 GB of RAM. You will need at least 200 MB of free disk space to install Gridworld. Make sure your have 500 MB of free disk space in order to install Gridworld. An Intel Core 2 Quad Q9000 CPU is required at a minimum to run Gridworld. However, the developers recommend a CPU greater or equal to an Intel Core 2 Quad Q6600 to play the game. The cheapest graphics card you can play it on is an NVIDIA GeForce 510.
Gridworld will run on PC system with Windows 7 64-bit or higher and upwards. Additionally it has a Linux version.