It's another fairly slow week for new PC game releases but there's still some interesting titles coming out, including the launch of a new MMO, a RTS game with weather effects and an expansion pack for a popular action-RPG game.

Magicka: Vietnam - This is the first mini-expansion pack for the sleeper hit action-RPG from developer Arrowhead Game Studios and publisher Paradox Interactive. Yes for $4.99 the game will add a new campaign where the wizards fight off creatures in the Vietnam jungle with spells and guns while trying to rescure POWs, Rambo style. Look for a new challenge map to be added to the game as well.