The Steam Page for Serious Sam HD: The Second Encounter now offers a playable demo of this first-person shooter remake, a bit of a surprise since the game was released over two years ago (thanks Frans). Typical of demos on Steam, there's no word on what it does, but anyone with a Steam account can try the game, and if they like it, it's currently on sale for 75% off. This may be related to the release of Legend of the Beast, a new DLC pack for the game, which is now available on Get Games and Steam.