The Arcade
Every game here is free, open-source, and built for two players on one screen — no signup, no payment, no ads, no catch. Pick a game, fly in together, and beat a level by actually understanding a real idea from science or math.
Playable now
🚀 Descent QED — ▶ Playable
A loving remake of the '90s classic Descent. You pilot a ship through glowing mathematical corridors; defeating each robot means grasping a real step of a famous proof. The first game climbs the Basel Problem on the way to the Riemann Hypothesis.
Enter Descent QED →
(robots with concept face association, fog glass road-signs, kindergarten color mix)
🏰 Quake: Principia — ▶ Playable
A true-3D remake of the '90s classic Quake, where a force-directed graph of Newton's Principia becomes a walkable dungeon. Every room is a proposition; every corridor is a logical dependency. The walls carry the real geometric proof — shoot a panel to "read" it (it glows from grey to color), light the final proof-wall to open a hidden door, and face the room's one demon. Co-op for two: one moves, one aims (keyboard/mouse, or joystick + Xbox).
Enter Quake: Principia →
(walls like an obsidian graph; find the secret door by lighting the proof, not by bumping into it)
🔨 Building now
🌌 Homeworld: A Good Basis — 🔨 Building — Sneak Peek
Inspired by Homeworld (1999). A two-player-one-screen space RTS where commanding your fleet is doing linear algebra: every ship is a column vector, your fleet is a matrix, and you reshape the whole formation at once with a transformation matrix — rotate, scale, scatter — watching the determinant, rank, and eigen-axis. An early sneak peek is playable now; the full 16-mission journey home is still being built.
Enter Homeworld: A Good Basis →
▶ Playable now
🎵 LOOM2 — Sonifiquation — ▶ Playable
Inspired by Loom (1990). Plant a Listening Totem in a landscape of z=f(x,y) and hear multivariable calculus: height becomes pitch, angle becomes timbre, radius becomes rhythm. Every musician inside the hearing circle plays at once so you hear a whole neighborhood as one chord — a surface is an orchestra, never a melody. Saddle points, the gradient, partial derivatives — all as music. Two players, one screen, one totem, 13 scenes.
Enter LOOM2 — Sonifiquation →
More peaks are coming soon:
(dialogue like my The Longest Quest)
(portals between 2 worlds: real and complex, real and p-adic)
(motion curve along function graph, in any vector field, not just gravity parabola)
(training trigonometry, integrals, train anti-moves by multiple-choice quiz)
(chemistry molecules / biology proteins / Group theory symmetries rotating/flipping)
(running along equation written on the wall, "perform" correct move extend next section to the right)
(driving on 3D landscape based on color maps of complex plane functions)
(bio-chemistry / molecular-biology, units build/buy/sell molecules, shooting smaller atoms/ions)
(calculus roads on hills and mountains like graphs built by functions, analysis fuel uphill costs money)
(topology, tracking open cars on twisted half-transparent surfaces)
(thermodynamics --> hydraulics --> electronic–hydraulic analogies, with piston instead of cue stick)
🔨 Built in public, improved in public. Watch it grow on GitHub.
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