Rocket Fortress

An idle defence game with a clicker's economy. Waves of enemies advance on your fortress, you fire missiles at them — manually at first, automatically soon after — and the currency they drop buys the upgrades that let you survive the next wave. The usual incremental loop, applied to a defence line. What makes it work better than a plain clicker is that the failure state is real. A wave that outpaces your damage breaks through and costs you progress, so the purchases have to keep ahead of a curve rather than simply going up, and a badly balanced build stalls in a way that requires rethinking instead of waiting. Damage, fire rate, range and explosive radius interact, and the efficient path keeps them in proportion. It earns while closed, which makes check-in play viable, and there is enough progression behind it — boss waves, new enemy types, a long upgrade ladder — to give a week of short sessions. The presentation is busy but the numbers are clear. It plays one-handed on a phone, saves reliably, and knows what it is: an idle game with a little bit of pressure in it.