A browser reef-keeping game

Keep a reef alive
in the deep sea

Plant coral across six ocean depths, weather the tides, and bring a dead patch of seabed back to life — glowing, one polyp at a time.

Free to play. Runs in your browser — no download.
How it works

Tend. Defend. Descend.

A cozy, slow loop you'll fall into for a few quiet minutes a day.

01

Plant

Choose a coral, set it on the seabed, and let it grow.

02

Tend

Clean it, feed it, angle it toward the light. Care decides yield.

03

Defend

Heat waves bleach. Starfish eat. Storms scour. You get three days' warning.

04

Descend

Six depths, each colder and stranger than the last. Deeper water, rarer coral.

The depths

Six ways down.

The light fades as you go — until Atlantis, where the dark finally gives way. Every depth grows coral you'll find nowhere else.

THE SHALLOWS

Prismfan

Bright, dappled, warm. Forgiving. Where you learn.

THE SLOPE

Twinbloom

Blue-green, fading light. The reef proper.

THE WALL

Coldlace

Deep blue, dim. Vertical. Dramatic.

THE DEEP

Pale Crown

Black. Bioluminescent only. Pressure, cold, and things with lights on their heads.

THE ABYSS

Voidbloom

The bottom of the world. Almost nothing survives here. What does is beautiful.

ATLANTIS

The Atlantian

A drowned temple, lit from above. The dark finally gives way.

Every depth has its own coral, its own threat, and its own dark.

The crates

Six crates. One you can buy.

Most crates you earn — Shells from farming the reef, Pearls from geodes, achievements and the race. Only the Valhalla crate opens with Crystals.

01

TIDEPOOL CRATE

260 Shells / open

Warm shallow water and whatever it left behind. Charms, tints, the odd decor piece.

Earned
02

REEF CRATE

1,400 Shells / open

Packed on the Slope and sealed with wax. Better charms, and once in a long while something that grows.

Earned
03

ABYSSAL CRATE

6 Pearls / open

Hauled up from the Deep with the pressure still in it. Real odds at a special seed.

EarnedSpecial seed
04

SOVEREIGN CRATE

18 Pearls / open

It was not made by hands. The only crate that has ever given up an ATLANTIAN.

EarnedCan drop an Atlantian
05

VALHALLA CRATE

5 Crystals / open

Somewhere in the hoard sleeps the 818 — only twenty will ever surface, and the hall swears an oath: open it 500 times and one is yours.

BuyableRare or better every openOnly 20 of the 818
06

GOD CRATE

1 Sovereign Key / open

Cut from pink diamond and lit from inside. Opens only with a Sovereign Key — finish a season in the race top fifty and the sea hands you one. Everything inside is godly. One thing inside is beyond.

Key onlyNot for sale
Crystals

The only thing money buys.

Crystals open the Valhalla crate, and nothing else. Shells and Pearls can't be bought — you earn those in the water.

Handful 5Crystals $5.99$1.20 each
1 Valhalla open
Pouch 15Crystals $14.99$1.00 each
3 Valhalla opens
Popular Chest 40Crystals $34.99$0.87 each
8 Valhalla opens
Best value Hoard 100Crystals $69.99$0.70 each
20 Valhalla opens
Longship 250Crystals $149.99$0.60 each · cheapest
50 Valhalla opens

Shells come from farming the reef. Pearls come from geodes, achievements and the race.
Crystals are the only thing bought with real money.

The deepest depth

Something waits in Atlantis.

Past the Abyss, a drowned city glows gold in water that should be black. Its statues still stand watch. Its great wheel still turns with the tides.

Reach it, tend what grows in its ruins, and the dark finally gives way.

Why Lunamere

Grows with you, or without you.

Nothing dies while you're gone.

Coral bleaches, it doesn't die. Come back after a week and your reef is still yours.

It farms itself.

Switch on autofarm and the reef tends itself — no clicking. Leave the game open in a tab and come back to the yield.

Finish top fifty, earn a God Crate.

Climb the race. The fifty best keepers each season are handed a God Crate — the rarest box in the sea.

Questions

Before you dive.

Do I need to download anything?+
No. Lunamere runs in your browser.
What am I actually doing?+
Growing a reef. Planting coral, keeping it healthy, protecting it from heat and predators, and slowly working your way deeper.
Are there rewards?+
There's a token planned for later, and playing earns points toward it. We won't say a rate or a date, because we don't know them yet and guessing would be lying.
When can I play?+
Right now. Lunamere is live at lunamere.online — open it and plant your first coral.
The reef is waiting

Grow a little light in the dark.

Plant your first coral and start the descent.

Play Lunamere

Free to play, right in your browser.