UFO Siege: Tower Defense

UFOs, monsters and dragons are marching on your castle. Build towers, upgrade them and hold the line! UFO Siege is a colorful 3D tower defense game that keeps surprising you: every few levels a new tower unlocks and a new enemy shows up with its own trick. 8 TOWERS TO UNLOCK • Ballista – fast arrows, can hit flyers • Cannon – explosive splash damage • Frost – slows every enemy around it • Poison – toxic damage over time that ignores armor • Catapult – huge boulders with the longest range • Dragon Slayer – the ONLY tower that can hurt dragons • Lightning – chain lightning that stuns • Fire – flames that burn through armor 25 KINDS OF INVADERS Slimes that split in two, ghosts that fade out, crabs with hard shells, healers, teleporting aliens, berserkers, yetis, fire demons, a skull-summoning Cthulhu and a golden chicken worth a pile of gold. Every new enemy is introduced with a card that tells you how to beat it. DRAGONS! Dragons fly straight over your maze and shrug off every ordinary tower. Only Dragon Slayer towers can bring them down, so plan ahead! 20 HAND-MADE LEVELS From cherry blossom hills and autumn woods to a volcano, glaciers and the Elder Dragon's lair. Every level has its own look and weather. POWERS Drop a Meteor, Freeze the whole map or start a Gold Rush when things get tight. Call waves early for bonus gold. • Plays offline, no account needed • Short levels, perfect for a quick break • Free to play, with optional videos for a second chance