Onslaught Online is a tower defense game where you build smart mazes of towers to hold the line and keep swarms from breaking your base.
Tap or click to place towers along the path and upgrade them between waves. Mix damage, splash, and slowing towers to control crowds. Watch enemy types and change targets or sell and rebuild when needed. Earn coins each wave to boost range, damage, and fire rate, and unlock new towers and bonus stages as you progress.
Tip: Place your strongest towers near corners and choke points so they hit enemies for longer.