Mergehold: Tower Defense

Contains adsIn-app purchases
Content rating
Everyone
100+
Downloads
Content rating
Everyone
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About this game

Two towers become one. One tower becomes a fortress.

Mergehold is a fantasy tower defense game built on a single satisfying move: drag one tower onto another of the same rank and watch them fuse into something far deadlier. Every rank hits more than twice as hard as the one below it — and frees a slot on your board. Merging always pays off. Knowing WHEN to merge is what separates a held keep from a fallen one.

MERGE TO GROW STRONGER
Buy towers, match them by colour and rank, and fuse your way up eight tiers. Archers, cannons, ice, lightning, flame, poison, marksmen and gold towers each change how a board plays. Space is tight. Every merge is a decision.

HOLD THE KEEP
This is not a game you watch. Raiders stop on the road and smash your towers to rubble. Throwers plant themselves at range and hurl rocks, fireballs and spell orbs at your line. Runners sprint past your slow guns. Armoured tanks soak everything you have. Read the incoming wave, then answer it.

10 REALMS, 120 LEVELS
March from the Dark Forest through the Poison Marsh, the Scorching Desert, the Dragon's Nest and on to the Doom Gate. Sixty monsters, each realm with its own creatures, palette and boss — goblin chieftains that split when they fall, demon lords that enrage at half health, ice kings that armour up mid-fight, wraiths that blink through your kill zone.

FORGE YOUR WAR CHEST
Gems buy permanent upgrades that carry into every run: damage, starting gold, tower durability, income. Unlock new tower types, boost the ones you love, and open star chests as you clear the campaign with three stars.

MORE TO CHASE
Daily quests, 15 achievements, a full bestiary that fills in as you kill, and a victory chest after every level.

PLAYS YOUR WAY
Portrait, one hand, no account required. Nine languages. Works offline once installed.

Free to play. Rewarded ads are always optional — watch one for gems or a second chance, or skip them entirely. Optional in-app purchases are available for players who want to move faster.

Merge. Empower. Defend.
Merge towers, hold the keep. 120 levels of fantasy merge tower defense.
Updated on
Aug 11, 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.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection

What’s new

NEW: Deck system — pick the 3-5 towers you take into battle and build your strategy!
NEW: 4 towers — Trebuchet, Beacon, Tar and Wind
NEW: Garrison — your keep gathers gold while you are away
NEW: Redesigned menu — tabbed pages, special offers, faster and cleaner
• Real 3D monster portraits in the codex
• Countdown and battle-start fixes
• Smoother screens and visual polish