Game III · New · Free demo

Red String RoninMoonfall

A hand-drawn 2-player co-op action platformer. Two souls bound by the red string of fate swing, zip and slice through yokai — the thread between you is your deadliest weapon — on the way to five screen-filling boss fights.

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🎮 Couch co-op · 2 gamepads 🌐 Online co-op by room code 🌕 Synced to tonight's real moon ✦ Newest release · Game III ▶ Free · browser · mobile
✦ Founders Pack — all games + exclusive content · $9.99 one-time

See it in motion

The live trailer

This is the real game playing itself in attract mode — two spirit AIs taking on the Whispering Bamboo.

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Built for two

One thread. Endless ways to use it.

🧵 Sweep itThe red thread between you cuts every yokai it touches. Run opposite circles to lasso a whole horde.
🪝 Swing & zipHang from your partner over a pit, zip to glowing moon hooks, stand on each other's heads to reach high ledges.
💥 ResonanceFill the thread gauge together, then BOTH press to unleash a screen-clearing combined ultimate.
⭐ AwakenDraft a new power every level. At level 6 your hero Awakens into a legendary form — visibly.
☠ Cuphead-style bossesFive 3-phase boss fights with telegraphs, bullet patterns and pink parries.
🌕 Real-world skyTonight's real moon phase, your local weather and Japan's festival calendar change your powers.

Choose your soul

The heroes

Akane the ronin swordswoman
Blade · Close range

Akane

The last ronin. Crescent Dash, moon waves — awakens the Tsukuyomi Blade.

Hotaru the firefly archer
Bow · Long range

Hotaru

Firefly archer. Homing swarms, exploding arrows — awakens as the Lantern Queen.

Gonta the tanuki monk
Mallet · Tank

Gonta

Tanuki monk. Ground pounds, belly drums, leaf glides — awakens as the Great Bake-danuki.

Yuki the onmyoji
Talismans · Support

Yuki

Star-reading onmyōji. Seals, paper cranes, team heals — unlock by clearing Chapter 2.

Five realms · five great yokai

The bosses

OmukadeŌmukade
Tamamo the nine-tailed vixenTamamo
Yuki-onnaYuki-onna
GashadokuroGashadokuro
The Hollow MoonThe Hollow Moon
Co-op platforming in the bamboo grove Gashadokuro boss fight Simultaneous co-op level-up draft Tamamo boss fight

🎮 Two controllers? Plug and play.

Xbox-style pads and the Logitech F310 work out of the box (set the F310's back switch to X). No pads? P1 plays on WASD + J K L, P2 on the arrow keys + , . /. Player 2 can drop in at any time. Far apart? Pick Online Co-op, share the 5-letter room code, and play together from two browsers.

▶ Play Red String Ronin free