The cheapest graphics card you can play it on is an NVIDIA GeForce GTX 1050. To play Bloom you will need a minimum CPU equivalent to an Intel Core i7-7Y75. Bloom system requirements state that you will need at least 4 GB of RAM. In terms of game file size, you will need at least 2 GB of free disk space available.
Bloom will run on PC system with Windows 7 and upwards. Additionally it has a Linux version.
