"Gem Defense: Clash Of Galaxies" is a interesting game of strategy based on centralized Gem system. This game abandons traditional mode that towers are build in specified locations, and monster is marching in regular path. Instead, the map is extensive and open. Your mission is more than building up different towers and you need to choose different gems for your towers to enhance your battle. This has made the game so special.-----Extensive Map-----This game requires an elaborative intelligence because the monster is marching on irregular path where tower could be an obstacle. Key to winning the game is positioning of the tower location.-----Muscling And Diversified Monster-----Monsters capability is drastically enabled, including healing, summon, charging, hiding, and mockery. Aren't you playing a RPG game?-----Darkness Approaching-----When darkness approaching, your sight dims by the screen...-----Gem System-----Gems can be set into the sockets of the towers. Different gem can provide different attacking effects. When 3 or more then 3 sockets are set with same gems, the tower will have auxiliary and powerful special effects. The more reasonably gem is decorated, the more effective in the combating of monster.1.Ruby: Increase attack armor penetration;2.Topaz: Increase attack critical hit chance;3.Saphire: Slow the target movement;4.Emerald: Tower attack posion the target;5.Chromatic Gem:Every attack will provide normal attacking effects as ruby, topaz, saphire and emerald;-----Five Different Towers-----1.Machine Gun Tower: Shoot single target. Fast attack speed. Low damage. Medium range;2.Missile Tower: Shoot single target. medium attack speed. Relatively high damage. Biggest range;3.Cannon tower: Multistrike. Low attack speed. High damage. Medium range;4.Laser tower: Mass attack. Low attack speed. Medium damage. Medium range;5.Blade tower: Mass attack. Fast attack speed. Low damage. Smallest range.-----Upgrading Of System-----All tower and techniques are upgradable. Winnings of gems and stars can be used for upgrading of skills and towers power in attack, and even new skill could be acquired.-----Different Modes Of Difficulties-----There are 3 stages for newer, challenger, ladder in progressive difficulty. In stage of Ladder, monster tends to be more changeable with super power, encouraging the player to make more progress in score, to share the joy and beating competitor.