awesome-gamedev-agent-skills is a collection of 73 instruction files that give AI coding agents specialized guidance for game development with engines and frameworks such as Godot, Unity, Unreal, and Phaser. It helps agents choose relevant engine and task guidance while building games. The catalogue entries are the collection's skills and plugins for agents including Claude Code, Cursor, Codex, and Gemini CLI.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add gamedev-skills/awesome-gamedev-agent-skills --skill tower-defensegit clone --depth 1 https://github.com/gamedev-skills/awesome-gamedev-agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/gamedev-skills/awesome-gamedev-agent-skills/tower-defense)<a href="https://agentmods.dev/skills/gamedev-skills/awesome-gamedev-agent-skills/tower-defense"><img src="https://agentmods.dev/badge/skills/gamedev-skills/awesome-gamedev-agent-skills/tower-defense/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/gamedev-skills/awesome-gamedev-agent-skills/tower-defense"><img src="https://agentmods.dev/badge/skills/gamedev-skills/awesome-gamedev-agent-skills/tower-defense.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00046 | $0.01684 |
| Opus 5.5 | $0.00018 | $0.00674 |
| Sonnet 5.5 | $0.00009 | $0.00337 |
| Haiku 4.5 | $0.00005 | $0.00168 |
Grade A, and why
tower-defense scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Tower Defense
A playbook for tower defense — enemy pathing, wave spawning, tower targeting, and the economy that ties them together. This is a compositional skill: it orchestrates pathing, AI, and UI into a TD loop. It does not re-teach pathfinding; it defines the systems and the balance levers (DPS vs. HP vs. income) that decide whether a TD is tense or trivial.
When to use
- Use when building a game where the player places towers that automatically attack waves of enemies following a path, spends earned currency to expand/upgrade, and loses if too many enemies leak through.
- Use when designing wave composition/pacing, tower targeting priorities, or the gold economy.
When not to use: the player directly controls a shooter → fps-shooter. Free-form base
building with needs → survival-crafting. For the pathfinding algorithm itself, use game-ai.
Core loop
Prepare (place/upgrade towers with current gold) → start the wave → enemies path toward the goal while towers auto-fire → earn gold from kills → survive the wave → repeat against a harder one. The tension is a planning puzzle: is my current DPS enough for what's coming, and can I afford the answer?
Must-have systems
- Enemy path — waypoint lanes, or grid + pathfinding for maze TD (refs).
- Wave spawner — timed, scripted sequences of enemy types with per-wave scaling.
- Towers — range, fire rate, damage, projectile/hitscan, splash; placement validity.
- Targeting — per-tower priority (first/last/closest/strongest/weakest) (refs).
- Economy — gold from kills + wave bonuses; tower/upgrade costs; sell refund.
- Lives / leak — enemies reaching the goal cost lives; 0 = game over.
- Wave/prep UI — lives, gold, next-wave preview, start-next-wave control.
Design knobs
| Knob | Effect | Notes |
|---|---|---|
| Enemy HP growth/wave | upgrade pressure | Geometric ~1.1–1.2× (refs). |
| Income vs. HP curves | difficulty | Player should almost afford each wave. |
| Tower DPS / range / cost | tower identity | Cheap+wide vs. expensive+tall. |
| Targeting priority | optimal placement | Changes play more than raw stats. |
| Enemy variety | counters one-build wins | Fast / armored / flying / swarm / boss. |
| Leak penalty | stakes | Cost lives and lost bounty. |
| Upgrade vs. build economy | strategy depth | Diminishing upgrade returns. |
| Wave pacing | tension curve | Spike → breather → spike, not monotonic. |
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago Changed · +3 lines 5b918ecfc6ed
- 1mo ago First seen · 122 lines · 46 tokens per session scan A 27f35ea5defd
tower-defense is a skill published in the GitHub repository gamedev-skills/awesome-gamedev-agent-skills (4,867 stars, last pushed 3d ago), licensed Apache-2.0. It adds 46 tokens to every session and 1,684 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
editor-session-quit
Save and quit an editor that a CLI session started (unity-mcp-cli exec, open --headless). Needs the session lease nonce; an editor the user opened is never closed. Used by unity-mcp-cli close.
screenshot-game-view
Capture a screenshot of the Unity Editor's Game View by reading its internal render texture directly. Image size matches the current Game View resolution; the tool corrects Y-flip on DirectX / Metal so the output is always upright. Requires an open Game View window.
dialogue-manager
Use when using the Dialogue Manager addon — .dialogue files with titles, responses, conditions and mutations, runtime balloons, and C# support.
event-bus
Use when implementing decoupled communication between nodes — global EventBus autoload with typed signals.
physics-system
Use when working with physics bodies, collision shapes, raycasting, areas, rigid bodies, ragdolls, soft bodies, Jolt physics, and physics interpolation in Godot 4.3+.
biome-detail-tuning
Configure and tune Unity Terrain detail (grass/flower/fern) placement for MapGenerator biomes using prefabs and noise-driven clustering. Covers the full workflow from prefab selection through noise parameter tuning to external audit verification and performance optimization. Use when: setting up detail for any biome…