The Raven Shield single-player demo is due out this week, this Friday-penned update on the official website claims. The demo will feature the Oil Refinery level from the full game (go go cs_oilrig), which is "playable in all four custom mission modes with three levels of difficulty for each". There will be 16 weapons and four weapon gadgets to pick from.
This is of course in addition to the existing multi-player, CS-style demo which has already been through several patches. For that, you can go straight here - handily, that's also the page where we expect the single-player demo to emerge.