One Tower: Idle Tower Defense

Upgrade one tower, survive endless waves, and master idle tower defense

One Tower: Idle Tower Defense is an idle tower defense game with a single rule: you never build a second tower. One tower stands between the core and an endless alien invasion, and every run is a chance to upgrade it, survive longer, and turn defeat into permanent power.Combat fires automatically. You spend the cash each wave earns on attack, defense, and utility upgrades, decide when to trigger your special weapons…