Thru to the end of January 2010, Voodoo Dimention–the duo of programmer Arthur Ostapenko and graphic-designer Alex Backlanov–are offering their popular tower defense title, Master of Defense, at an incredibly low price. Use the discount code “HAPPYHOLIDAYS” at this location and enjoy the game for only $4 (usually $19.84). Voodoo Dimention is intent on celebrating the holidays until late January and they’re sharing their joy with gamers.

In Master of Defense, you must save the kingdom from the invading evil forces. Just as any other game in the tower defense genre, you accumulate money by disposing of monsters. With four upgradeable towers to deploy, you must use the unique capabilities of each and make your way through 180 raids, 6 locations, and a survival mode and get onto the online leaderboards. Voodoo Dimention promises that Master of Defense is an addictive game with high replay value because of its upgrade system. At only $4, it’s hard for any of us to doubt its worth.

Read on for a gameplay clip!