Tower Defense: Barrier

A portal hangs over the battlefield, spilling creatures into human territory. Tower Defense: Barrier places futuristic guns against that breach, with combat spreading across deserts, jungle ground, and deserted city streets. Gold coins and crystals pile up after fights, funding stronger artillery for the next assault. Huge bosses arrive on later maps. Humanity stands behind the line.

How to play?

Set defensive structures on the field and spend resources on towers that fire at nearby enemies automatically. Fallen monsters drop mana points. Use that mana to summon additional turrets. Merge two matching turrets to raise their rank and increase firing speed. Extra powers call down a meteor shower or drop massive boulders onto the invading wave. New platforms unlock during battle. Place reserve troops there and extend the defense line.