Chess & Go?! There seems to be a puritan strain in this thread? Go to SourceForge & find a copy of 'Sauerbraten'. It's a beautifully coded, older-PC-friendly, Quake-like game.
At the risk of getting slapped down by Admin & assuming you're AV & Firewalled up...
http://www.cashstrappedgamer.com/
I'm not recommending it, just saying it's out there!!
Edit: It may just be rubbish?!