TERRAGEARTH system requirements state that you will need at least 4 GB of RAM. The cheapest graphics card you can play it on is an Intel HD 4000. To play TERRAGEARTH you will need a minimum CPU equivalent to an Intel Core i5-650. In terms of game file size, you will need at least 400 MB of free disk space available.
TERRAGEARTH will run on PC system with Windows7 and upwards.