Merge up to T10
Merge two towers of the same tier into the next one; from T5, feed towers of the same family to awaken it up to T10.
Draw. Merge. Awaken. Win in 5 minutes.
Coming soon to Google Play
Join Discord for early news
Join Discord for early news
to join Discord
Features
7 tower families at launch, more every season
Every tower sends out its own squad, with a signature ability from T1. 3 more arrive in seasons 2–4.
5-minute PvP duels
1v1 duels in Ranked, Casual and Friendly matches, decided within 5 minutes.
1,000-stage Campaign
Your board is never reset: push through 50 chapters and 1,000 stages of monster nests and bosses.
Tower families
7 families at launch, 3 more in seasons 2–4. Every family is one army: a tower and the squad it sends out share one family and one signature ability.
Iron Bastion
Front-line tank · Squad: Shield Knight
A heavy keep that sends shield knights to hold the line.
Signature abilityThe Shield Knights' shields block ranged damage, more at higher tiers.
Star Ballista
Long-range picks · Squad: Crossbowman
Precision picks: its first bolt at every new target always crits, and the crossbowmen hit fresh enemies hard with their first shot too.
Signature abilityEach Crossbowman hits every new target harder with the first bolt.
Frost Spire
Control and slow · Squad: Frost Mage
Frost control: slows and freezes the squads rushing your building sockets.
Signature abilityEach Frost Mage slows every enemy it hits, longer at higher tiers.
War Catapult
Tower breaker · Squad: Bombardier
Heavy artillery, and sappers that tear down towers and pound the castle.
Signature abilityEach Bombardier deals extra damage to towers and the castle.
Life Banner
Healing support · Squad: Banner Healer
Repairs allied towers while banner healers rally the front line.
Signature abilityEvery Banner Healer attack heals the weakest ally nearby.
Beetle Hive
Rush and land grab · Squad: Dart Beetle
Fast spawns: beetle swarms grab neutral land quickly.
Signature abilityEach Dart Beetle hits harder with every strike on the same target.
Storm Coil
Crowd damage · Squad: Storm Caller
Chain lightning: every arc jumps to nearby enemies, made for packed squads.
Signature abilityEach Storm Caller's arc jumps to another enemy nearby.
Venom Vat
Season 2Damage over time · Squad: Alchemist
Arrives in season 2
Lingering mist: every shot leaves poison that keeps hurting enemies and towers standing in it, built to hold the front.
Signature abilityThe Alchemists' flasks leave pools that keep hurting enemies standing in them.
Golem Circle
Season 3Attrition · Squad: Rune Golem
Arrives in season 3
Death summons: a fallen rune golem rises again as a small golem, so the lane never breaks at once.
Signature abilityWhen a Rune Golem falls, a small golem rises in its place.
Mirror
Season 4Counter · Squad: Mirror Envoy
Arrives in season 4
Turns the opponent's attack back on them. The full story comes before this family arrives.
Signature abilityThe signature ability is revealed before this family arrives.
Gameplay
Real in-game captures, shown with the Traditional Chinese interface; the English interface is on its way.
Join the Zero Bound community
Get the latest news, test sign-ups and events on Discord, and meet other players.
Join DiscordSupport: support@playzerobound.com
FAQ
What is Zero Bound?
A mobile merge tower duel: draw towers onto building sockets, merge towers of the same tier into the next one and let their squads take the enemy castle.
Where can I play? Is there an iPhone version?
On Android phones, through Google Play. There is no iPhone version.
Is it free?
Free to play, with in-app purchases. Every tower family that affects power can be earned for free, and paid summons show their full odds before you buy.
When does it launch?
Soon on Google Play. Join Discord to hear first about the launch and pre-registration.
Is PvP fair?
Permanent tower levels add at most 12% health and attack; Friendly matches and event modes use standard levels. Skins, achievements and the codex never change PvP stats.
Which languages are supported?
The game and this site support Traditional Chinese, Simplified Chinese and English. The first launch follows your phone's language; you can change it in the settings.
How do I keep my progress on a new phone?
Get a transfer code on the account page in the game and enter it on the new phone, or link a sign-in method.
How do I delete my account?
Delete it in the game, or follow the steps on the account deletion page. Account deletion
How do I contact support?
Email support, or leave us a message on Discord. support@playzerobound.com