Prism Guard

About the game

Split a prism beam across a falling storm and keep an ice-moon colony standing. The tower overheats; you choose what lands.

A meteor storm is falling on an ice moon and the prism tower is all that stands between the rocks and the colony. Tap a rock to mark it and the tower swings and fires. Mark two or more lying close together and the prism disperses: one shot takes them all, for far less heat, at half the power. Every shot heats the prism and a full bar cuts the tower out, so you cannot save everything and must choose what lands. Four kinds of rock, each with its own clock and its own tell. Two in five are falling on bare ice and can safely be ignored, and every rock shows you the point it will hit. Six named storm stages give way to a Deep Storm that never stops growing. Five upgrade lines, two offered at a time, one of them uncapped. Real 3D with cast shadows, and a flat fallback where there is no WebGL. Endless, offline, eleven languages, one HTML file.

How to play

1. Tap any falling meteor to mark it. The prism tower swings toward the mark and fires a beam as soon as it is lined up.
2. Every meteor that lands takes out a dome. Lose them all and the colony goes dark.
3. Chondrite breaks in one beam. Ferrous shrugs off a dispersed beam and needs a focused one. Icy shards are fast. A cluster breaks into three — kill it high, not late.
4. Mark two or more rocks close together and one shot takes them all, for far less heat — but at half the power. Three or more vents the prism and pays a bonus.
5. Every shot heats the prism. Fill the bar and the tower cuts out until it cools. Rocks falling on bare ice are harmless — let them go.
6. The camera button, C, or the D-pad's up: the colony, down at the prism, or high over the ice.

Controls