Team Xbox got a bit of a sneak peek at Sierra Online's offering for next week's big show. They say the company, a division of Vivendi Games, plans to unveil three new Xbox Live Arcade titles, including Battlestar Galatica. Hit the jump for the full descriptions and the link for plenty of more details, screens and even a video.

Switchball
Coming to Xbox LIVE Arcade late this summer, Switchball challenges players to control an ever-changing ball along a narrow and challenging course suspended in midair. A polymorphous ball exhibits different physical characteristics as it changes form as either a standard Marbleball, a feather-light Airball, an electrically charged Powerball or a dense and powerful Metalball. Players will have to solve their way through challenging levels packed with tricky obstacles, traps and mazes. With beautifully rendered 3D environments including Skyworld, Iceworld, Caveworld, Cloudworld and Lavaworld, Switchball features an advanced physics engine, allowing players to interact with objects just as they would in the real world.

Commanders: Attack!
Commanders: Attack! is a gripping turn-based tactical game with a combination of strategic troop placement and entertaining head-to-head warfare. Featuring a 1930's art deco look and feel, players will use missile launchers, bombers and infantry to amputate the enemies' defenses and conquer the land. Players can choose to challenge the computer AI in a 15-mission campaign across three different landscapes or battle against three friends either locally or online in four intense multiplayer modes - Versus, Team Play, Player vs. CPU or same-system Skirmish. Commanders: Attack! will be available on Xbox LIVE Arcade and Windows PC this fall.

Battlestar Galactica
Inspired by the hit television series, Battlestar Galactica, airing on the SCI FI Channel, Battlestar Galactica is an action-packed top-down space combat game set in the universe of the hugely popular sci-fi television show. Players can take part in enormous multiplayer space battles with up to eight players online or play through the single-player campaign that includes memorable missions from the TV series. Pilots can either sign up to defend the Galactica or play as the ruthless Cylons as they seek to remove the human race from existence. With full 3D graphics to show off the detailed ships and cosmic environments, Battlestar Galactica allows players to fly four Human and four Cylon ships from the Viper II to the Cylon raider, each with unique weapon capabilities. Battlestar Galactica will be available on Xbox LIVE Arcade.

Sierra Online XBLA Blowout [Team Xbox, via XBL Arcade]