In terms of game file size, you will need at least 700 MB of free disk space available. Forest Plague system requirements state that you will need at least 1 GB of RAM. The cheapest graphics card you can play it on is an NVIDIA GeForce 8500 GT. An Intel Core 2 Duo T7250 CPU is required at a minimum to run Forest Plague.
Forest Plague will run on PC system with Windows 7 and newer and upwards. Additionally it has a Mac version.
Minimum System Requirements
CPU
2.5 GHz Intel® Core™2 Duo or better
RAM
1 GB RAM
OS
Mac OS X 10.7
Graphics Card
512 MB
HDD Space
700 MB available space
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