Godot Tower Defense Core – Godot 4 tower defense starter kit / template

Data-driven towers, enemies and waves with upgrades, targeting and flyers – typed, headless-tested, ready to reskin.

Godot Tower Defense Core: a Godot 4 tower defense starter kit and project template in typed GDScript. Free MIT Lite on GitHub (54 headless tests), Pro €6.00 on itch.io (128 headless tests).

Get it

Lite (free, MIT): https://github.com/openclawaimac/godot-tower-defense-core-lite – The full TD logic: JSON towers/enemies/waves/map, 4 targeting modes, splash, slow, flyers, armor, upgrades and a 3-wave demo. 54 tests.
Pro (€6.00 EUR, commercial EULA): https://huginhelm.itch.io/godot-tower-defense-core – 128 passing headless tests, playable demo

Engine: Godot 4.7 (tested on 4.7.2) · Language: typed GDScript · Version 0.3.0 · Run tests: bash tools/run_tests.sh

Lite vs Pro

Feature	Lite (free, MIT)	Pro (€6.00, EULA)
Core scripts: TDContent, TDMap, TDEnemy, TDTower, TDWaveSpawner, TDEconomy	✅ same 6 scripts	✅
Targeting modes, splash, slow, air/ground, armor, flyers, upgrade levels, sell refund	✅	✅
JSON content (towers, enemies, waves, map)	Small sample: 2 towers, 2 enemies, 3 waves	✅ 4 towers, 6 enemies, 12 waves
Playable demo	Minimal demo (build, sell, next wave)	✅ full demo: HUD build bar, hover/upgrade panel, wave preview, win/lose screen
Camera pan/zoom, game speed, pause, mute	–	✅
Juice: recoil, muzzle flash, explosions, floating numbers	–	✅
Sprites (Kenney CC0)	✅	✅
Sound effects, jingles, music (CC0)	–	✅
Headless tests	✅ 54 checks	✅ 128 checks
Web export preset, capture tooling, AGENTS.md / llms.txt, design notes	–	✅
Licence	MIT	Commercial EULA (per seat)

Features (Pro)

TDContent: towers, enemies, waves and the map in one JSON file, with validate()
TDMap: cell grid with path / blocked / buildable cells, world ↔ cell conversion, validation
TDEnemy: follows a polyline path; hp, speed, armor (flat reduction), slow, bounty, leak damage, flying flag
TDTower: hitscan towers with FIRST / LAST / STRONGEST / CLOSEST targeting, splash, slow, air/ground filter, DPS readout
Data-driven upgrade levels and sell refund (70% of gold spent)
TDWaveSpawner: data-driven waves with per-wave HP scaling, wave-clear bonus, next-wave preview, placement rules, sell, win/lose signals
TDEconomy: gold, lives and a defeated signal
Headless-friendly: auto_tick = false + advance(delta) drives the whole game from tests
Playable demo: 4 towers, 6 enemy types (incl. flyers and a boss), 12 waves; build bar, hover/upgrade panel with targeting toggle, wave preview, win/lose screen
Demo juice: recoil, muzzle flash, explosions, floating numbers; camera pan/zoom; 1x/2x/3x speed, pause, mute
Kenney CC0 sprites, sfx and jingles, "Battle Theme A" (CC0) music; HTML5 web demo

Not included

One fixed path per map (no maze building / pathfinding); single map in the demo
Hitscan towers – no projectile physics
No save/load, meta-progression, hero units or abilities
No multiplayer
Tested headless on Godot 4.7.2 (plus scripted headless-Chrome run of the web export); real browsers/devices not tested

Preview

Screenshots

Godot Tower Defense Core screenshot: build

Godot Tower Defense Core screenshot: wave

Godot Tower Defense Core screenshot: upgrade

Godot Tower Defense Core screenshot: late game

Godot Tower Defense Core screenshot: victory

Assets & licence

Kenney Tower Defense (top-down) sprites, Kenney sfx/jingles/fonts, "Battle Theme A" by cynicmusic – all CC0.

Lite is free under the MIT License. Pro is sold under a commercial per-seat EULA: you can ship unlimited commercial and non-commercial games; you may not resell or redistribute the kit's source or assets as a template. Bundled art/audio is CC0.

Code and docs written with AI coding agents. Machine-readable summary: llms.txt.