How to play Merge Defenders
- Tap Summon to place a random tier 1 defender: Archer, Mage, Cannon, Frost or Storm. Each summon costs a little more; kills and cleared waves pay coins.
- Drag a defender onto an identical one (same type and tier) to merge them into a random defender one tier higher. Drag onto any other slot to move it.
- Monsters march along the road. Each one that reaches the castle costs a heart (bosses cost two) — lose them all and the run ends.
- Every 5th wave brings a mini-boss and every 10th a boss. Power buttons boost a whole unit type. Upgrades add hearts, starting coins and damage.
Missions to chase
Every run counts toward missions that pay out XP. Clear a tier to unlock the next one:
- Reach wave 5
- Merge 30 defenders in total
- Make a tier 3 defender
- Defeat a boss
- Make a tier 5 defender
- Defeat 2,000 monsters in total
Upgrades
Coins you earn buy permanent upgrades for Merge Defenders:
- ❤️ Castle Walls — +1 heart at the start of a run
- 🪙 War Chest — +25 starting coins
- ⚔️ Sharpened Steel — +8% damage for every defender
Good to know
- Free and instant: runs in your browser on phone, tablet or desktop — nothing to install.
- Session length: about 4–12 min per round, perfect for a short break.
- Progress saves automatically in this browser: best scores, missions and favorites.
Start playing Merge Defenders or browse all Play Hub games.
