The cheapest graphics card you can play it on is an ATI Radeon HD 5770. An Intel Pentium 4 2.53GHz CPU is required at a minimum to run Bird Game. Bird Game system requirements state that you will need at least 2 GB of RAM. In terms of game file size, you will need at least 4 GB of free disk space available.
Bird Game will run on PC system with Windows 7/8/8.1/10 and upwards. Additionally it has Mac and Linux versions.