A tower defense game where you don't click to shoot — you write code your towers run every tick, in Python, JavaScript, C++, C#, Rust, Zig or Lua. Prioritize threats with if, sweep swarms with for, and route air, armor and camo to the right tower. Better algorithms beat more towers.

<h2 class="bb_tag" >You don't place towers. You program them.</h2>Compile &amp; Defend is a tower defense game with no click-to-shoot. Every tower on the field runs your code, once per tick. Write a smarter script and your defense gets smarter — write a sloppy one and the swarm walks right through.It's the tower defense game for people who'd rather refactor than micromanage.<h2 class="bb_tag" >Write it in your language</h2>There's no proprietary scripting dialect to learn. You write in a clean subset of a real language you already know — pick from Python, JavaScript, C++, C#, Rust, Zig, or Lua. They all compile to the same engine; the language only changes how your code is spelled. Switch anytime.<h2 class="bb_tag" >How it plays</h2>Your program is bound to each tower every tick — me is the tower, me.enemies_in_range is what it can see, me.shoot(target) pulls the trigger. From there it's all you!The closest enemy isn't always the most dangerous one — so the naive shoot the first thing you see script will always get you started, and never win. Better algorithms beat more towers.<h2 class="bb_tag" >Features</h2><ul class="bb_ul"><li>Code-driven combat — a real (but safe) interpreter runs your script. Clear, line-numbered errors, because debugging is half the genre. </li><li>A teaching campaign — a seven-stage tutorial walks you from your first shoot to full for-loop swarm control, introducing each threat one step before the tool that beats it. </li><li>13 campaign maps across three tiers. </li><li>Easy / Normal / Hard — harder modes are tougher and longer, pushing you into scaled freeplay for the medal. Earn up to three stars per map, including a bespoke coding challenge that rewards a genuinely better algorithm, not just more gold. </li><li>Ten distinct towers — Arrow, Cannon, Tesla, Sniper, Frost, Venom, Support, Mortar, Chain and Detect, each with its own API: slow enemies, poison them, buff allies, lob splash at a point, chain lightning through a cluster, or reveal camo for your other towers. </li><li>Eight threats to route around — fast Runners, flying Flyers, armored Brutes, camo Shades, swarming Spawnlings, self-splitting Broods, and the nested Titan boss. </li><li>Build and share your own levels — draw a map, draft its waves, and share it with a single copy-paste code. An auto-balancer certifies every level is beatable and code-mandatory before you play. </li><li>Sandbox mode — infinite gold, every enemy on tap, hot-swap your code live. Prototype a controller, break it, fix it.</li></ul>Everything is deterministic, so a script that wins today wins tomorrow.Write once. Compile. Defend.

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