Yar, it's the Intel GMA 3100 in there. Unfortunately, Intel's line of integrated chipsets have mixed and flaky results with Legions: Overdrive and are unsupported.
However, not all is lost, your desktop does have an available PCI-e x16 slot, so perhaps a dedicated GPU could be installed in your system to help you play more robust games. Unfortunately the internet is quite slow where I'm at so I can't really research your system more fully (to see what would be compatible with your system). If you're interested, Seymour can take a look later and post hardware options for you.