Merge Elementals: Castle Defense

Merge Elementals: Castle Defense is a merge, tower defense, and strategy game where a horde is marching on your castle. All that stands in its way is a wall and a handful of elementals.

Merge identical fighters to push them up the tiers. Fire, water, and earth combine into wind, lava, and nature, which combine again into ice, energy, spirit, and sandstorm. With twelve elements in total, some burn an area, some slow the horde, and some eliminate a single target.

Between waves, level up your magic and take three spells into battle, including fireball, frost storm, chain lightning, meteor shower, and dragon call.

The campaign continues across swamp, snow peaks, desert tombs, fungus forest, lava inferno, void, and meadows. Each world features ten waves, with a boss waiting at the end. Your army and gold carry over between worlds, allowing you to keep building your strength as you progress.

Features

Merge identical fighters to create stronger elementals

Twelve elements with different abilities and effects

Level up magic and choose three spells to take into battle

Defend your castle across multiple unique worlds

Ten waves per world, ending with a boss battle

Carry your army and gold between worlds

Collect chests, keys, scrolls, castle upgrades, and daily rewards

How to Play

Drag identical elementals onto each other. Two fighters of the same type and tier fuse into the next tier. Gold only buys tier-one fighters, while everything above comes from merging. Grid space is limited, so think carefully about what you combine.

Once your line-up is ready, hit Start Wave. Merging is locked during combat. Your fighters aim and shoot automatically, while your job is to cast spells at the right time and keep the wall standing. Every enemy defeated drops gold.

When the wave is over, return to the preparation phase to buy, rearrange, and upgrade your fighters. The last wave of each world is a boss battle, and defeating it unlocks the next biome.

If the wall goes down, you can revive on the spot using gems and continue the battle.