software · Picked by us

An 11-day endless shooter with a decision log to match

Spaceshooter 3

A free endless browser shooter with stackable power-ups, five rarity tiers, weapon modifiers and mini-bosses every five waves. Built from an empty folder in 11 days with Claude Opus 4.8 — and a devlog that shows 30 sessions and 16 decision records, not one-shot prompting.

By Mathieu Casmo @casmo

Play Spaceshooter 3
Read the v1.0 devlog

The 11-day build, session by session

Free in the browser on itch.io

Made With Models illustration of a lone starfighter weaving through a neon asteroid field, stacked power-up orbs trailing in its wake, a mini-boss silhouette looming at the horizon; this is not a screenshot of the game.
A look at the result

What it does

Play a tight endless arcade loop — and see what deliberate, session-by-session AI development looks like when it ships.

Who it helps

People curious about AI-assisted game development and endless arcade games.

How it was made

Models
Claude Opus 4.8 · creator-reported
Tools
Maintained context file · Continuity across 30 build sessions
Public source repository · The build, inspectable
  1. Casmo built the game from an empty folder in 11 days, one session at a time — the devlog records 30 sessions and 16 decision records.
  2. Architecture came before features: a maintained context file, testing and balance passes instead of one-shot prompting.
  3. Version 1.0 shipped 2026-07-02 and the “Drones & Lasers” update followed on 2026-07-25.

What the person did

Casmo made the final decisions, tuned the balance and integrated each session; the devlog shows the deliberate process behind the arcade feel.

What we know

Creator-reported: The live game, the version 1.0 devlog and the public repository; the 11-day, 30-session figures are creator-reported.

Access checked — 2026-09-29 · Opened the itch page, the devlog and the repository on 2026-09-29.

Can you use it?

The game stays on itch.io; we link only and host no captures. No repository licence was visible, so the code and credited assets keep their own terms. The cover is an original Made With Models illustration, not a screenshot of the game.

About this project

Picked by Made With Models. Added 2026-09-29. Updated 2026-09-29.