Merge to Power Up
Drag matching allies together to level them up—from simple arrows to a level 10 dragon.
Merge × Lane Defense Action
HOLD THE BULWARK.
Merge your allies, hold the line, and crush the undead legion across 30 stages.
Free onGoogle Play
iPhone / iPadiOS coming soon
Free to play · iOS coming soon
FEATURES
Four Pillars of the Bulwark
Hold the Line for 30 Stages
Every stage brings more and tougher enemies. Runners, tanks, and mighty bosses will try to break through.
Turn the Tide with Special Items
Wide Bomb, Power Bomb, Piercing Shot. Timing is everything.
Climb the Global Ranking
Compete for the highest kill count with players around the world.
HOW TO PLAY
How to Play
STEP 01
Tap to Summon
Tap the screen to call allies onto your defense line.
STEP 02
Drag to Merge
Drop an ally onto another of the same level to merge and level up—10 levels in all.
STEP 03
Hold the Line
Allies attack on their own. Choose where and when to place them, and meet the legion head-on.
Merge your way from Arrow to Dragon
Lv.1 Arrow
2
3
4
5
6
7
8
9
Lv.10 Dragon
SCREENSHOTS
A Look at the Battlefield
Swipe to browse · Tap to enlarge
ARSENAL & LEGION
Your Arsenal & the Legion
Special Items
Earned free by defeating enemies.
Wide Bomb
Hits every enemy on screen.
Power Bomb
Massive damage in a tight radius.
Piercing Shot
Tears straight through a whole lane.
Potions
Heal HP / Max HP Up
After key stages, choose your reward: items or HP.
The Undead Legion
Ghoul FootmanInfantry
The legion's relentless rank and file. Cut them down, and more keep coming.
Bone RiderFast Cavalry
Strikes through any gap and races for the wall. Don't let it slip past.
Brute GiantGiant
Swings a massive club and shrugs off weak hits.
Death KnightBoss Cavalry
An armored warlord who leads the charge. Meet it with everything you have.
Tune Your Tactics
Set how often allies target bosses, and what your items aim at.
GLOBAL RANKING
Compete with Players Worldwide
Post your kill count to the global leaderboard, then share your result card with friends.
Global ranking by kill count
Share your result card
Japanese & English
RESULT
HOLD THE BULWARK
STAGE
— —
KILLS
— — —
WORLD RANK
# — — —
Mockup — replace with an actual result card
FAQ
FAQ
Is it free to play?
Yes. The game is free to play. You can optionally watch ads for bonuses, and optional in-app purchases are available.
Can I play on iPhone?
The game is currently available on Android (Google Play). An iOS version is in preparation.
Can I play offline?
Yes, you can play offline. The global ranking, ads, and in-app purchases require an internet connection.
Do I need to pay to clear the game?
Special items drop for free when you defeat enemies. Watching ads and in-app purchases are entirely optional.
Can I transfer my save data?
Sorry, transferring save data is not currently supported.
Where do I report a bug?
Please use the Contact form linked at the bottom of this page. Including your device model, OS version, and what happened helps us investigate.
Get it on Google Play
iOS coming soon