Repulse the attack of UFOs in new freeware Zuma game from Game-Mahjong.com. The chain of enemy spaceships tries to reach our planet. Shoot at the enemies in such way to explode three or more UFOs of the same color. Use bonuses to slow the chain movement, to improve the sight and score additional points. The game has excellent gameplay and great graphics. Download and play completely free for Windows and Mac OS.