Prism Bastion

Prism Bastion is a geometric tower-defense game about building attacks like programs. Instead of choosing a fixed weapon, you load modules into each tower from left to right. Projectiles, modifiers, targeting logic, trails, and triggers are compiled into a working attack sequence—and changing the order can completely change the result.

Guide piercing needles toward survivors, split burning projectiles across a crowd, bounce oversized blades through a lane, or deploy mines and persistent fields from nested triggers. Every tower is a small system to design, test, and refine while increasingly complex signals move toward the core.

Features

• 36 combinable modules across projectiles, modifiers, static payloads, trails, and logic.
• Order-driven construction: modules affect what comes after them, so sequencing is as important as selection.
• Standard Mode with limited inventory, module drafts, wave rewards, tower upgrades, and economy management.
• Creative Mode with unlimited modules and shards, adjustable run settings, and a signal-spawning console.
• Five geometric sectors, including a guided opening mission and a multi-entrance route.
• Five difficulty settings for relaxed experimentation or tightly optimized defenses.
• Distinct signal mechanics including shields, splitting, armor, suppression auras, and mixed elite waves.
• A local Defense Archive that records completed runs, statistics, discoveries, and achievements.
• English and Simplified Chinese, with mouse, keyboard, and touch-friendly controls.

How to play

Choose a sector, mode, and difficulty, then deploy towers on the marked nodes. Open a tower's workshop and arrange modules into a valid sequence. Launch the next wave, study what gets through, and rebuild your programs around the threats ahead.

On desktop, drag modules into slots or double-click one for quick installation. On touch devices, tap to select or hold briefly and drag. Landscape orientation is recommended on mobile; supported browsers can enter fullscreen from the home screen.

Can you compile a defense strong enough to hold the Bastion?

Open source

Prism Bastion is open source. Follow development, report issues, or explore the code on GitHub.