Mostly stuff like black ops 2, battlefield 3, CSGO, there’s a free knock off of playerunkown’s battleground but I forgot the name, you could probably find it
bioshock series, old call of duty, alien isolation, battlefield3-4, some assasins creed,all medal of honor , metro 2033 and last light, skyrim,far cry 2-3,
You can play the PC builder simulator so you can practice for when you finally decide to upgrade your shit. In all seriousness, pre-2010 games you might be able to get away with, some of which you'll probably have to knock the settings down on