Idle Kingdom Builder system requirements state that you will need at least 2 GB of RAM. To play Idle Kingdom Builder you will need a minimum CPU equivalent to an Intel Pentium 4 2.00GHz. The cheapest graphics card you can play it on is an NVIDIA GeForce 510. In terms of game file size, you will need at least 300 MB of free disk space available.
Idle Kingdom Builder will run on PC system with Windows 7 or newer and upwards.
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