City Defense is a free online 3D tower defense game where you protect your city by strategically placing troops and obstacles across the battlefield in real time. Each enemy wave hits harder than the last, so smart deployment is everything — you can't just spam units and hope for the best. Every placement decision matters from the very first round.

The game rewards players who think ahead. Between waves, you get time to upgrade your existing units or reinforce weak points in your defense line. Some troops handle crowd control while others deal heavy single-target damage, so mixing your squad composition is key to holding the line. The 3D perspective gives you a solid read on enemy approach paths, which helps you figure out where to concentrate your firepower before it's too late. Getting caught off guard by a flanking wave after ignoring a side route is a very real problem here.

City Defense is a great pick for fans of tower defense strategy games, military war games, and real-time action shooters who want a solid challenge without installing anything. If you enjoy games like classic TD titles or base defense war games online, this one fits right into that category. Players searching for free 3D defense games, browser strategy war games, or city protection shooting games will find exactly what they're looking for — jump straight into the action from any device, no download required.