Lethal Geometry

Laser tower defense

Lethal Geometry is a tower defense game for PC with no towers: you have one laser and a budget, and build a path for its beam using mirrors, splitters, and lenses. The beam itself damages enemies, so your defenses depend on where it travels and how much power it has left when it gets there.

Each enemy the beam passes through absorbs some of its power. Drones thin it out, while armored hulls take most of the energy and shield enemies behind them. Mirrors carry the remaining power onward, but lenses and upgrades can restore it. Hitting an armored group from behind can take out its escorts first; firing head-on wastes energy against the shielding hull.