Bastion Zero: Castle Defense

Contains ads
Content rating
Everyone
10+
Downloads
Content rating
Everyone
Mild Fantasy Violence
Learn more
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this game

Hold the line. Defend the castle.

Bastion Zero is a colorful tower defense game where you build your own army card by card. Orcs, wolves, trolls, golems and fire-breathing dragons march down the roads toward your castle. Place soldiers and heroes on the stone pads along the road, merge them into stronger units and stop every wave before it reaches the gate.

HOW TO PLAY
• Buy soldiers from the battle shop with the gold you earn.
• Drag them onto the pads beside the road.
• Two of the same soldier merge into a stronger one: collect stars and unlock champion powers.
• Reroll the shop, plan your gold and survive every wave.

FEATURES
• 60 levels in 12 regions: green valleys, ancient forests, deserts, swamps, snowy passes, volcanoes, autumn woods, stormy coasts, red canyons, lost jungles, glaciers and the Shadow Realm.
• Boss battles with ogres and dragons, and maps with one, two or three roads.
• 17 soldiers and 30 mythic heroes, each with its own skill; heroes unleash powerful ultimates in battle.
• Build your deck: choose which cards appear in the battle shop.
• Open bronze, silver and gold packs to collect cards and level them up.
• Grow your commander level, upgrade your castle and unlock new castle looks.
• Earn up to 3 stars on every level.
• Bright hand-painted chibi art with lively maps.
• Plays offline. No ads interrupt the game; optional rewarded ads give bonus gold, a second chance or a free pack.
• Available in English, Turkish, German, Japanese and Chinese.

Gather your army, merge your heroes and become the last bastion!
Tower defense with merge heroes: defend your castle across 60 epic levels!
Updated on
Nov 4, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Location, App activity and 2 others
  • This app may collect these data types
    Location, App activity and 2 others
  • Data is encrypted in transit
  • Data can’t be deleted

What’s new

Version 1.2: 30 new levels in 6 new regions (60 levels in total), maps with three roads, new bosses, and the game is now available in German, Japanese and Chinese.