The puzzle-filled labyrinths of Switchball and the logic challenges of Word Puzzle represent this week's Xbox Live Arcade Games. Both arrive on the download service this Wednesday, November 7, and both will sell for 800 Microsoft Points ($10).

The mazes of the Atomic Elbow-developed, Sierra Online-published Switchball require players to alter the properties of their ball to clear obstacles, such as barriers vulnerable to the Metalball or what Microsoft describes as "physics based death traps," which mandate the Airball. In addition to five environments, the game packs two-player online co-op and eight-player racing.

According to publisher Microsoft, InterServ International's Word Puzzle contains "a whole host of synapse melting challenges." It includes five different game modes, allowing up to four local or online opponents to compete for word searching glory, and InterServ promises an abundance of downloadable word packs to keep the action fresh.