Alliances
Astrakeep alliances: open or closed, ranks, construction help, donations, translated chat, reporting, plus the planned territories, wars and bosses.
Besiege kingdoms. Awaken your heroes. Build your realm.
Hero strategy and PvPAstrakeep, the hero strategy game where every battle is a siege
Astrakeep is a free hero strategy game, available on Android (Google Play) and playable in your browser; the iPhone app is coming soon. Every battle is a siege: play troop, spell and hero cards across three lanes to bring down the enemy towers, then the keep. Battle other players in PvP, work through a 145-level campaign, grow your kingdom of floating islands and join an alliance.
Free · Android · 8 languages
Astrakeep's heroes
Astrakeep has 13 heroes. Three join you from the start. Epic heroes are summoned at the Summoning Altar; four of them, Kiran the Star Whelp, Solène the Lantern Keeper, Mio the Shadow Child and Bolt the Link Golem, are also given to you as you move through the campaign. Aurelion and Sylvara are unlocked with 40 legendary shards or in the shop; Jinhou and Varek only come with their own pack, in the shop.
Hover a hero (or tap them) to watch their awakening animation.
Lyra the Archer
Rare · Rapid fire. Special attack: Arrow Rain.
Assault stats Lv. 1 · 1★ Lv. 16 · 5★ Health 1,000 8,140 Damage per hit 13 120 Damage per second 38 349 Time between attacks 0.55 s 0.55 s Range 4.5 tiles 4.5 tiles 
Orin the Mage
Rare · Area damage. Special attack: Arcane Meteor.
Assault stats Lv. 1 · 1★ Lv. 16 · 5★ Health 1,000 8,140 Damage per hit 20 185 Damage per second 30 275 Time between attacks 1.4 s 1.4 s Range 3.9 tiles 3.9 tiles 
Kael the Knight
Rare · Melee heavy hitter who blocks ground enemies. Special attack: Guardian's Shock.
Assault stats Lv. 1 · 1★ Lv. 16 · 5★ Health 1,000 8,140 Damage per hit 36 333 Damage per second 58 533 Time between attacks 1 s 1 s Range Melee Melee 
Nyx the Sorceress
Epic · Frost. Special attack: Blizzard.
Assault stats Lv. 1 · 1★ Lv. 16 · 5★ Health 1,000 8,140 Damage per hit 12 111 Damage per second 21 197 Time between attacks 0.9 s 0.9 s Range 4.2 tiles 4.2 tiles 
Tharok the Bombardier
Epic · Bombs thrown from very far away. Special attack: Bomb Barrage.
Assault stats Lv. 1 · 1★ Lv. 16 · 5★ Health 1,000 8,140 Damage per hit 20 185 Damage per second 23 214 Time between attacks 1.8 s 1.8 s Range 4.5 tiles 4.5 tiles 
Aurelion the Paladin
Legendary · Spears of light. Special attack: Celestial Judgment.
Assault stats Lv. 1 · 1★ Lv. 16 · 5★ Health 1,000 8,140 Damage per hit 34 315 Damage per second 64 596 Time between attacks 1.1 s 1.1 s Range 4.3 tiles 4.3 tiles 
Sylvara the Empress
Legendary · Dragonfire. Special attack: Imperial Breath.
Assault stats Lv. 1 · 1★ Lv. 16 · 5★ Health 1,000 8,140 Damage per hit 26 241 Damage per second 54 501 Time between attacks 1 s 1 s Range 4.5 tiles 4.5 tiles 
Jinhou the Monkey King
Legendary · A star staff that stretches out to strike groups. Special attack: Celestial Staff.
Assault stats Lv. 1 · 1★ Lv. 16 · 5★ Health 1,000 8,140 Damage per hit 30 278 Damage per second 69 642 Time between attacks 0.9 s 0.9 s Range 4.5 tiles 4.5 tiles 
Varek the Ember Prince
Legendary · Fights bare-handed and throws fireballs. Special attack: Star Burst.
Assault stats Lv. 1 · 1★ Lv. 16 · 5★ Health 1,000 8,140 Damage per hit 36 333 Damage per second 83 770 Time between attacks 0.9 s 0.9 s Range 4.3 tiles 4.3 tiles
Hero awakening
When a hero reaches both max level and 5 stars, they awaken. In assaults, their special attack is replaced by an awakened power and their combo with troops gets stronger. Their look changes too, with golden trims and glowing eyes.
Hover a hero (or tap them) to watch their awakening animation.
- Awakened form
Lyra the Archer
Star Storm
One volley on its target, then one in each of the other two lanes, on the tightest group of enemies.
- Awakened form
Orin the Mage
Meteor Shower
3 meteors: on the target, then on nearby groups. A rampart hit takes 100% of the damage.
- Awakened form
Kael the Knight
Steel Bastion
A wider shockwave that stuns around him; allies within 3 tiles take 40% less damage for 5 s.
- Awakened form
Nyx the Sorceress
Eternal Winter
Freezes every enemy in its lane for 2.5 s, then slows them for 3 s; when attacking, that lane’s rampart freezes too.
- Awakened form
Tharok the Bombardier
Grand Charge
A bomb that blows after 1 s: 80% of its damage to ramparts, and a tower under 25% health collapses.
- Awakened form
Aurelion the Paladin
Sacred Aegis
Allies within 3.5 tiles of the impact become invulnerable for 2.5 s, then recover 15% of their health.
- Awakened form
Sylvara the Empress
Imperial Decree
Heals all allied troops by 35% and their hits deal +100% for 4 s.
- Awakened form
Jinhou the Monkey King
A Thousand Staffs
The staff crashes down on the target, then 4 staffs fall around it, on the tightest group: each deals 35% of the damage.
- Awakened form
Varek the Ember Prince
Last Burst
A star beam hits the target, then 3 bursts follow around it, each dealing 50% of the damage. After 45 s of combat, an awakened Varek takes his astral form: +20% damage and power.
Astrakeep in pictures
The Kingdom of Astra, with Orin's tips 
Arcane Isle, one of the kingdom's 4 islands 
A village island on the world map 
A Citadel, a territory alliances will fight over 
Dragon Bastion, one of the 5 rival villages to raid
What awaits you in Astrakeep
Every battle is a siege
An energy gauge and a hand of 4 cards: send troops, spells and heroes down one of three lanes. A fallen tower is worth 1 star, the keep 3. Each troop beats another: footmen swarm guards, guards stop griffins, griffins bring down colossi, colossi crush footmen.
PvP: besiege other players
The kingdom's "Battle" button opens PvP: pick an opponent at your level and besiege their village. Battles have no randomness and are checked by the server. On Sundays, the tournament arena offers instant battles with no troop losses.
A 145-level campaign
28 chapters, from the Floating Isles to the Open Heart: every level is an enemy kingdom to besiege, and a boss guards the keep at the end of each chapter. The story unfolds in six acts.
A kingdom of 4 islands to build
Battle loot grows 10 buildings spread over 4 floating islands around the Crystal Tower. Construction and production keep going even when the game is closed.
13 heroes to level up and awaken
Level up your heroes and give them stars. Each hero boosts a troop placed next to them: Kael and Varek the footmen, Lyra and Jinhou the griffins. At max level with 5 stars, a hero awakens: an awakened power replaces their special attack.
Alliances, chat and territories
Join an alliance: members help each other finish construction, launch rallies and chat with built-in translation and moderation. Territories, alliance wars and alliance bosses are planned in the game.
A shop with clear rules
Gems never buy summons. Everything is sold at a listed price, with no paid random draws. Rewarded videos are optional: you decide.
Astrakeep FAQ
Is Astrakeep free?
Yes. Astrakeep is free to play, with optional in-app purchases. The shop rules are shown in the game: gems never buy summons, everything has a fixed price with no paid random draws, and rewarded videos are always the player's choice.
On which phones can I play Astrakeep?
Astrakeep is out for free on Android, on Google Play. You can also play it in your browser, on a phone or on a computer. The iPhone version is coming soon: no release date has been announced yet.
Can I play Astrakeep without an internet connection?
Your kingdom keeps producing and your buildings keep progressing even when the game is closed. Playing with others, however, needs an internet connection: attacks between players, alliances and chat.
Which languages is Astrakeep available in?
Astrakeep is translated into 8 languages: English, French, German, Spanish, Italian, Brazilian Portuguese, Japanese and Simplified Chinese.
How do you get new heroes?
You start with Lyra, Orin and Kael, and Kiran the Star Whelp is given to you at the end of the tutorial; Solène, Mio and Bolt join you after campaign levels 15, 40 and 75. Epic heroes are summoned at the Summoning Altar with tokens (daily chest, 7th login day, expedition to the Sky Ruins), with an epic card guaranteed within 10 summons. Legendary heroes can't be summoned: Aurelion and Sylvara are unlocked with 40 legendary shards or bought in the shop, and Jinhou and Varek only come with their own pack, in the shop. Like every hero, a legendary is capped against other players by your Crystal Tower.
How do you awaken a hero in Astrakeep?
Raise the hero to max level (which also depends on your Crystal Tower) and give them all 5 stars with shards: they awaken automatically. In assaults, their special attack is then replaced by their awakened power, such as Eternal Winter for Nyx, and the bonus they give to nearby troops increases.
Can I play Astrakeep online without installing it?
Yes. Astrakeep is free to play in the browser of your computer, phone or tablet, at djoox.com/play/astrakeep/. To continue the same game on another device, first attach your email in the game: tap "Account", then "Protect my game". On the other device, open "Account", choose "I already have an account" and enter the same address: a 6-digit code is sent to you, and your most advanced game is loaded.
Is Astrakeep still a tower defense game?
No. Since the October 16, 2026 update, Astrakeep has no tower defense: the campaign, raids, the Ascension and battles against other players are all sieges. You play your cards across three lanes to bring down an enemy kingdom's towers, then its keep.
Download Astrakeep
Free on Google Play, and playable online in your browser; the iPhone version is coming soon.
Astrakeep guide
Rules, tips and strategies: it's all explained in Astrakeep guide. To discover other games of the same kind, see Free strategy games on mobile.
Hero awakening
Astrakeep hero awakening: how to awaken a hero (max level and 5 stars), all 13 awakened powers, their troop combos and how to use them in sieges.
Campaign
The Astrakeep campaign: 145 levels in 28 chapters and six acts, an enemy kingdom to besiege in every level and a boss guarding each chapter.
Heroes
All 13 Astrakeep heroes, from Lyra to Kiran the Star Whelp: roles, special attacks, summoning, gifted heroes, stars, awakening and legendaries.
Islands and buildings
Astrakeep buildings explained: 4 islands, 10 buildings, the Crystal Tower that caps them all, what to upgrade first and how the second builder works.
Troops and raids
Astrakeep raids and PvP: the 4 troops and their cycle, the 5 rival villages, sieges against other players, the arena, spells and ramparts.
Beginner guide
Astrakeep beginner guide: the tutorial with Orin, your first priorities, daily quests and chest, protecting your game, your player name and HD image.
Astrakeep articles and community
Our articles about Astrakeep, and the forum to share tips and questions with other players.
How to play tower defense: the basics, step by step
How to play tower defense on mobile: the path, placement, upgrades and special attacks explained in five steps, plus the common beginner mistakes.
The studio behind the game
Astrakeep is made by Djoox Studio, an independent mobile game studio. Also discover Zertyzzle, our crystal merge puzzle game.