Obsidio

Endless survival on a 96 × 96 map: five weapons with six levels each, a dozen ground and air enemies, surges, the Leviathan, upgrade cards, repair drones, powers, missiles and a commander with a skill tree. The caves open one by one and, after half an hour, every surge makes them tougher until you can no longer hold. Before all that, a three-level tutorial.

Everything comes from code: the models from Blender scripts, the music and sounds from a synthesiser in the browser, and the rules from a dependency-free TypeScript core that a simulator plays headless to tune the curve.