OnLIve is hosting a demo for Red Faction: Armageddon, allowing players to test out 30 minutes of the game.
As Gamefront pointed out, you don't need a paid OnLive account to try the service's demos, so anybody willing to register should be able to have a go.
The demo isn't a crafted taster like the Xbox Live version, but timed access to the game itself, so get cracking and see what you can.
OnLive is promoting the Volition title with a pre-order offer of a free microconsole.
Red Faction: Armagdeeon is due on Online, PC, PlayStation 3 and X360 in early June.