Gaikai Video Game Advertising Network | Play Video Games Online They have a demo for Mass Effect 2 (wait a few seconds and a pop-up will appear). It's a cloud based online demo system. No downloads, no installs, no plug-ins, nothing. Apparently works on any device. I tried this out today. I have a super fast connection at work and it ran as if it was on my own machine. However, on a slower connection, it's near unplayable. But this is pretty damn impressive stuff.