Play Block Bastion free online. Build a futuristic defense network, redirect ground forces with walls, counter air units, and protect the command core through an escalating campaign. No download, ads, purchases, or sign-up.
Overview
Block Bastion is a 3D tower-defense strategy game. Enemy convoys advance through a voxel battlefield toward your command core. Spend coins on towers and structures, decide when to launch the next wave, and adapt the defense as tougher ground and air units enter the fight.
How to play
Choose a build card, then select a valid highlighted position on the battlefield. Confirm the placement to spend its cost. Press Send Wave when your defenses are ready. Towers attack automatically, while you control construction, upgrades, sales, and the route enemies must follow.
Towers and structures
Cannons provide dependable ground damage. Anti-air towers target flyers. Missiles deliver heavy strikes, EMP and Tesla defenses slow or disrupt enemies, and walls reshape ground routes. Mines produce income, while factories and labs unlock advanced weapons and upgrades.
Campaign progression
Each level contains several waves and introduces stronger attackers. Survive with command-core health remaining to advance. Coins earned from destroyed units fund new construction. Your choices carry through the level, so an efficient early layout creates more options for later waves.
Strategy and tips
Avoid relying on one damage type. Cover both ground and air routes, use walls to extend the time enemies spend under fire, and place slowing towers where several weapons can exploit them. Keep enough coins available to react to the incoming-wave preview instead of filling every pad immediately.
Controls
Use a mouse or touchscreen. Select build cards from the compact bottom strip, tap the battlefield to preview and confirm placement, and tap an existing defense to upgrade or sell it. The pause control opens Resume, Settings, and Exit options. Landscape mode provides the full-height battlefield view.
Frequently asked questions
Is the web edition free? Yes, with no ads or purchases. Why is a card dark? You may lack coins, the required factory or lab, or the campaign level needed to unlock it. Can enemies be blocked completely? No; walls reshape legal routes but must leave a path. Does progress persist? Campaign progress is stored locally in this browser.
