Tower Swap

Swap resource tiles to craft towers and defend your castle against dragon waves in Tower Swap, playable for free in your web browser.

Tower Swap

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What is Tower Swap?

Tower Swap is a strategy puzzle game combining tile matching mechanics with active castle defense. Instead of clearing tiles simply for points, players swap materials on a grid to construct tactical fortifications and protect their castle from waves of attacking dragons. The game runs directly in any modern desktop or mobile web browser with nothing to install.

Key features

Resource assembly: Aligning three matching material tiles creates active weapons, barriers, or chests directly on the board.
Tiered merging: Grouping three identical defensive structures together combines them into an upgraded unit with increased defensive power.
Limited move allowance: Each turn grants a fixed count of tile swaps to prepare defenses before dragons swoop in.
Dragon boss encounters: Day 10 and day 20 introduce powerful boss dragons that spawn swarms of smaller drakes upon defeat.
Directional boss warnings: A directional arrow alerts players to the upcoming boss entry zone so defenses can be concentrated.
Clan and avatar progression: Players can establish an account to join clans, customize a character avatar, and collect gold rewards.

How to play

Survey the game board to locate matching clusters of raw materials such as stone, logs, ice, and gunpowder.
Swap adjacent items to align 3 identical resources into a defensive structure.
Spend your available swaps strategically to reinforce threatened lanes before the dragon timer triggers an assault.
Consolidate three matching defensive units into higher-tier fortifications when you need concentrated firepower.
Watch for warning arrows before day 10 and day 20 to position your heavy defenses against incoming boss dragons.
Defend your castle walls against the dragon swarm and collect gold coins when the run finishes.

Resource crafting and structure types

Success requires converting raw harvest resources into active defensive emplacements before hostile creatures reach the perimeter. Assembling three tiles of the same resource material produces a distinct combat structure.

Resource	Resulting structure	Combat function
Stone	Defensive attack tower	Shoots projectiles at approaching flying dragons from a distance.
Gunpowder	Cannon installation	Launches explosive munitions against groups of flying monsters.
Ice	Ice wall barrier	Slows down dragon movement and blocks the direct path toward your castle.
Logs	Attack turret	Fires rapid defensive strikes against nearby enemy fliers.
Gold	Treasure chest	Provides additional swaps along with utility items such as TNT and anvils.

Positioning and merging require balanced judgment. Merging three adjacent defensive units builds a stronger fortification, but reducing unit count shrinks your overall board coverage. Waiting until heavy waves threaten specific corridors is often the best tactical choice.

Tips and strategy

Hold off on premature merges: Keeping multiple separate turrets covers more board surface. Only combine three matching defenses when you face heavy single targets that demand concentrated firepower.
Track the boss alert arrow: The game displays an indicator pointing to the lane where the dragon boss will arrive. Shift your defensive investments toward that corridor ahead of day 10 and day 20.
Conserve your swap allowance: Swaps are strictly limited prior to each dragon wave. Avoid shuffling tiles aimlessly and ensure every move either builds a defense or sets up an immediate match.
Create chests for utility tools: Combining gold tiles produces chests that yield extra swap moves as well as tools like anvils and TNT for swift board upgrades.
Prepare for boss minion bursts: Slaying a dragon boss causes a swarm of smaller dragons to scatter across the board. Keep a distributed perimeter of defenses so these quick monsters cannot sneak past your walls.

Similar games

Cursed Treasure offers tactical defense mechanics where players protect valuable gems from persistent waves of invaders.
Mergest Kingdom focuses on matching and combining resources on a grid to expand medieval settlements and construct new items.
Clash of Skulls challenges players to deploy diverse warrior units across battle lanes in lane defense warfare.

Developer and history

Tower Swap was developed by Curtastic and launched on May 24, 2021. Built to run smoothly across desktop and mobile browsers, the title pairs grid puzzle planning with tactical castle defense.