EIGEN//TD

Hold the lattice.

Play the free browser demo on this page. The full game is included as the paid download: a single self-contained HTML file you can double-click and play offline, no install.

Demo build:

- 3 Act 1 maps: Crossroads, The Spiral, Split Decision

- Waves 1-25

- Daily Signal

- One puzzle protocol taster

- Permanent progression and save export/import

Save note:

Browser demo saves live in this browser's storage. Export anytime via Settings > Save Data > Export. The full download can import the same save, and keeps playing offline.

EIGEN//TD is a fast, neon tower defense game built around build variety and replayability. Enemies pour through glowing circuits toward your exit - line up the right towers, in the right places, with the right upgrades, and hold the line.

Build, fuse, specialize.

Eight distinct towers - Ballistic, Cryo, Splash, Sniper, Rapid, Chain, Beacon, and Mine - each with five upgrade levels. Push a tower to max and overclock it, specialize it down one of two paths, or fuse two adjacent towers into one of ten powerful hybrids. No two defenses play the same.

Nine maps, a 100-wave campaign, and beyond.

Every map has its own layout and tricks - converging lanes, power nodes, routes that shift after each boss. Survive the first act, then push into Act 2: Evolution - fifty more waves where the swarm studies how you fight and grows resistant to your favorite weapons. Clear it all and drop into Endless to draft fractures and boss trophies for an escalating, score-chasing run.

Puzzles, contracts, and maps of your own.

Six hand-authored protocols hand you a fixed board and a strict toolkit. Weekly contracts rotate seeded objectives that pay Cores. The Sector Editor lets you paint your own maps and share them as short codes - same for full run setups via run codes.

Roguelite progression that sticks.

Earn Cores for permanent meta-upgrades. Level mastery on each tower to unlock new towers and once-per-run signature abilities. Equip relics that bend the rules.

Made to be played your way.

Full controller support. Reduced motion, high contrast, larger text, and colorblind options. Quick to learn, deep enough for hundreds of runs.

An adaptive synth soundtrack gives every map its own theme and ramps up when the bosses arrive.

Features:

- 8 towers x 5 levels + 10 fusions + 16 specializations

- 9 hand-built maps and a 100-wave campaign across two acts

- Act 2: Evolution - the swarm adapts to how you fight

- Endless mode with drafted fractures and boss trophies

- 6 puzzle protocols with fixed boards and strict toolkits

- Sector Editor: build custom maps, share them as codes

- 40+ relics, per-tower mastery, permanent meta-upgrades

- Daily challenge, weekly fracture ladder, and weekly contracts

Why $6.18? The geometry demanded it. φ