Is this grid tower defense game free?

Yes. Idle Grid Tower Defense is completely free and runs in your browser — no download, no signup. Your progress saves automatically.

How is it different from a normal idle game?

It is a real tower defense: enemies march along a fixed path on a grid and you place and upgrade towers on the grass tiles to stop them. Turn on auto-waves and it plays itself, earning gold while you idle and offline.

What is prestige for?

After reaching wave 25 you can prestige to reset your run for permanent crystal multipliers — more global damage, gold and offline efficiency — so you push far deeper each time.

Idle Grid Tower Defense — Build Towers, Defend the Path (Free Browser TD)

0Gold

1Wave

20Lives

0DPS

0Crystals