Play Classic 
A kingdom woven from dreams
Asteria is a kingdom woven from dreams.
The Heart Crystal is its waking pulse.
Dreams are being stolen. The creatures at the gates are only the beginning. Follow their trail through moonlit gardens and broken sky-temples—and bring Asteria’s wishes home.
Explore the kingdomsEvery heart has a story
Winter’s Memory
frost · Frost control
“Be still. The frost remembers what fear forgets.”
A prodigy who could hear memories sleeping inside snowflakes, Mira sealed an endless nightmare beneath Iceglass Conservatory’s frozen observatory. Her calm discipline hides a gentle fascination with ordinary warmth—and a fierce refusal to let another dream be forgotten. A familiar voice or a kitchen’s warmth can matter more than a grand occasion.
Iceglass ConservatoryLantern of Dawn
light · Anti-air archer
“Even the smallest wish deserves a way home.”
Hikari once guided lost dreams home with nothing but a paper lantern and an old cedar bow. When corruption reached Kasumi Shrine’s gates, the fox spirits chose her as their living emissary. Years of guiding the lost taught her to wait for an answer before choosing the path; frightened travelers seldom need another voice telling them to hurry.
Kasumi ShrineLast Light of Asteria
light · Shield breaker
“Stand behind my wings. Dawn is already on its way.”
Seraphina descended from the shattered sky-temple carrying its final unbroken star. The Empyrean Guard’s celestial order expected a solemn weapon; instead, they received a compassionate knight who measures victory by every life carried safely through the storm. Her first concern remains the people beside her, from the earliest defense to the final nightmare.
Empyrean GuardPearls of the Quiet Choir
frost · Frost choir
“You may hum. Nobody here is being examined.”
Nereida collects songs people fear they have forgotten. When the Nacre Choir’s oldest hymn lost its words, nightmares began singing its missing melody. She welcomes mistakes in everyone else’s music, though her own unfinished composition remains hidden in her travel ledger.
Nacre ChoirAmberwall Bombardier
fire · Cluster artillery
“Gate clear. Someone put the kettle on.”
Runa learned to defend roads by counting the people who still needed to cross them. Her range book records couriers, supply wagons and evacuation routes alongside the measurements for her enormous siege cannon. Between battles she repairs small brass mechanisms; one little bird stubbornly insists on flying backward.
AmberwallUnbroken Oath
light · Boss hunter
“One promise. I will see it through.”
A dawn outrider from Dawnwatch Causeway, Aurelia holds one promise through the longest night. Each spectral spear carries the resolve of an oath she refuses to abandon. On the causeway, she learned to judge a journey by the last traveler to arrive, never the first.
Dawnwatch CausewayShared Fate
shadow · Fate-link support
“A single thread can change the whole pattern.”
A patient magical couturier from Roseweft Atelier, Evelisse repairs ceremonial garments and stitches enemies’ fates together. Her confidence comes from precision. Years spent restoring treasured clothes taught her to ask which worn seams a customer wanted preserved; a flawless replacement can lose what made a garment matter.
Roseweft AtelierPearlwake Broadside
frost · Frost burst gunner
“Keep the treasure. I’m here for my people.”
A cheerful privateer from Pearlwake Freeport, Marielle stole back her crew’s memories from the dream tides. Four pearl rounds leave her flintlock before the nightmares can catch their breath. Since that voyage, she takes particular care over the ship’s log, recording small jokes and uneventful landfalls alongside battles.
Pearlwake FreeportThe Laughing Shadow
shadow · Leak hunter
“If you saw me coming, I was being polite.”
Rin-Rin was raised among the Paper Moon Clan’s dream-thieves, but stole back every hope her clan had taken and vanished beneath a shower of pink paper petals. She fights with impossible speed, playful bravado, and a private ledger containing every promise she still intends to keep. At the Petal Sanctuary, she takes the shadows so others can guard the path.
Paper Moon ClanCountess of the Crimson Eclipse
shadow · Armor breaker
“Do mind the parasol. It is older than your nightmare.”
Lady Noctis of House Umbra ruled the moonward edge of Asteria long before the Heart Crystal was crowned. Feared for her ancient blood and impeccable manners, she broke a century of isolation when the Heartbreaker disturbed the roses sleeping beneath her estate. She keeps a meticulous account of the garden’s seasons, including years the rest of the kingdom scarcely remembers.
House UmbraBottled Sunrise
none · Golden aura support
“A pinch of hope, two sparks—and absolutely no shaking!”
Poppy of Brassbell Atelier believes courage is a chemical reaction waiting for the right catalyst. Her mobile laboratory has exploded seven times, improved morale in twelve districts, and produced the golden tonic that lets the Heartguard move as one brilliant constellation. Her notebooks give failed mixtures as much space as successful ones, with increasingly emphatic instructions about shaking.
Brassbell AtelierCrescent of the Last Moon
shadow · Crescent reaper
“One clean stroke. Even nightmares cast a shadow.”
Tsukiko guarded the moon gate until the night itself cracked open. Carrying a moon-tempered odachi from Ryūgetsu’s royal forge, she follows the spectral dragon that remembers every road the stars have forgotten. The discipline of Ryūgetsu Court stays with her: she inspects a crossing before resting and leaves her blade within reach.
Ryūgetsu CourtThe Laughing Furnace
fire · Burning ground
“Stand back, count to three, and admire the craftsmanship!”
Ember of the Emberforge Guild rebuilt a ruined dragon furnace into a cannon small enough to carry and far too loud to ignore. She treats every impossible siege as an engineering problem with a pleasantly explosive answer. The same hands that built her cannon still mend ordinary tools.
Emberforge GuildOracle of Quiet Stars
light · Dream oracle
“The future is only frightening when faced alone.”
From Mirrormere Observatory, Luma reads futures in the reflections dreams leave behind. Her lantern reveals the hidden weakness in every corrupted wish, though she never speaks of the single future she refuses to accept. She will describe a danger, but refuses to let a prediction make someone’s decision for them.
Mirrormere ObservatoryBlossom at First Light
fire · Maple wardancer
“A hundred petals, one perfect step.”
At Hanamori Terrace, Kaede learned the wardance from gardeners who protected Asteria’s oldest dream-tree. Each sweep of her paired maple fans carries a season of petals, turning crowded paths into a bright storm of precise, joyful cuts. Her teachers expected equal care from pruning shears and dancing feet, and she still notices a neglected planting bed before a grand entrance.
Hanamori TerraceVoice of the Violet Storm
frost · Storm disruptor
“Keep tempo. The thunder knows the chorus.”
Zephyra of Stormglass Conservatory once conducted lightning for sold-out sky concerts. When the Spire fell silent, she tuned its broken thunder into a battle hymn that leaps from nightmare to nightmare without missing a beat. Between battles she practices quieter phrases, saving a new concert program for the day an audience can gather simply to listen.
Stormglass ConservatoryKeeper of the Thirteenth Hour
light · Astral chronomancer
“Time does not forgive. Fortunately, I do.”
At the Astral Meridian, Oriana guards the single hour history forgot. Her clockwork constellations cannot erase a tragedy, but they can give a brave heart one more moment to change its ending. She is exacting about the moments others overlook: time to finish a sentence, catch a departing hand, or decide before a door closes.
Astral MeridianFive-star Waifus
Countess of the Crimson Eclipse
The Feast Is Over
Official music videoEven an ancient countess can set down her ledger and leave a chair ready for your next visit.
Last Light of Asteria
Behind My Wings
Official music videoAfter counting everyone safely home, Seraphina finally takes the seat you saved for her.
Pearls of the Quiet Choir
You May Hum
Official music videoShe guards a forgotten hymn—and an unfinished tune she is learning to share.
Keeper of the Thirteenth Hour
The Thirteenth Hour
Official music videoThe keeper of a lost hour knows when to let a moment take as long as it needs.
Unbroken Oath
Dawnwatch
Official music videoHer promise ends only when the last traveler reaches the gates, even if the tea has gone cold.
Amberwall Bombardier
Range Book
Official music videoBetween battles, a kettle waits beside her range book and a brass bird that insists on flying backward.
Crescent of the Last Moon
Moon Gate
Official music videoHer blade stays within reach. Beside someone she trusts, the guardian of the moonroad can finally close her eyes.
The heart of the battle
A beautiful world. A relentless enemy.
A defense that is yours to create.
Distinct elements and combat roles. Find the team you want by your side.
Place your Waifus along the enemy’s route. Combine their strengths and make every position count.
Face thirty-one kinds of foes and the bosses of Asteria’s ten kingdoms.
Beyond the gates
A new challenge awaits
The journey through Asteria
Defend ten kingdoms, uncover their stories, and face the bosses waiting at the end of the road.
A different challenge awaits
Adapt your defense to shared challenges that change each day and week.
How long can you hold?
Wave after wave. Keep your crystal standing and push your defense further.
Roll. Merge. Defend.
Roll Waifus and merge units to upgrade your defense against endless waves.
Where the adventure began
The original 2D adventure. Seventeen Waifus, ten kingdoms,
and a Heart Crystal worth defending.
Free in your browser · Invite-based playtest
Development
The first teaser for the ground-up 3D remake.
Read updateReplay audio and enemy inspection move closer to the live battle experience.
Read updateDrag waifus from the battle tray into position, and explore a refreshed Rankings page.
Read updateBefore your adventure
Classic is playable.
The 3D remake is coming soon.
Heartguard Classic is free to play in the browser, with invite-based playtesting. Heartguard 3D is still in development.
Classic is designed for phones and desktop browsers. Supported devices for Heartguard 3D will be confirmed closer to release.
Only Heartguard Classic has a playtest. Open Classic to request an invitation. Heartguard 3D does not have a playtest.
Character profiles use original Classic art. The banner, scenery and music posters are new promotional illustrations. Watch the teaser for a first look at the 3D remake.
Community
Development updates and player discussion.
