With extreme low settings yes it will.Even Quake 4 will run but remember to turn the Shadows Off for it or else it will lag like hell in both outdoor and indoors.Turn the resolution to 640x480 in Quake 4 and 800x600 in Serious Sam 2 and you'll do just fine.Expect the load times to be a bit high in Quake 4 though on your 512MB Ram.