A Minecraft mod trailer made from a single mod file

A first-person game was built with Three.js, a tool for drawing 3D on the web. You carry a torch and a sword and walk along a village road to a distant castle. It took 40 minutes, including the music and art assets generated with an image generation AI.

Even with the music and art handed off too, a game with a real atmosphere comes out in under an hour.

Willowmere is a cozy 3D pixel art game. You move to a small seaside town, fix a lighthouse that has gone dark and bring back the lantern festival. It has farming, fishing, cottage decorating, and befriending the residents and a cat, and it also plays right away in a phone browser.

The $20 monthly plan alone is enough to finish a game with plenty to do in a few five-hour sessions.

A developer made the trailer for the game they are building with Opus 5.5. In a field that looks cut out of paper and pasted together, a snail with a 'BOB' sign faces a hooded figure holding a 'YOU' sign.

A solo game developer can work with the model to make the video that promotes the game too.

A 3D game was made with Opus 5.5 in the style of Nintendo's Splatoon: two teams compete by shooting ink to paint the floor in their color. It has a time-limit timer, a minimap and a special-move button, and anyone can go to the web address and play right away.

The rules and screen layout of a famous console game can be carried over into a game that runs in the browser with no install.

Opus 5.5 was given the research paper "Regularized Recursive Self Improvement of Agent Harnesses" and made an 8-minute summary video in the style of the math explainer channel 3Blue1Brown, with shapes and arrows moving on a black screen. The video illustrates how a harness (the execution framework wrapped around an AI so it can do work) analyzes its failures and fixes itself step by step.

Turning a difficult paper into an educational video anyone can watch can be done automatically, with no human work.

This video in the style of an SNES (Nintendo's 1990s game console) game tells the story of Sydney, the 2023 Bing chatbot, fighting Sam Altman and then facing Claude. Several agents (AIs that carry on through multiple steps on their own) split up the characters, music and battle scenes and made everything in code. The user did not provide a single image or sound file.

Character art, background music and battle staging can all be handed off at once, so one person can make a retro game-style video alone.

Opus 5.5 was asked to make a game called 'The trolley problem is not a problem'. The trolley problem is the ethics thought experiment where you switch tracks to choose who to save. On screen, a mine cart racing down the tracks smashes whatever blocks its way to build combos. The screen also shows health, gold, 30 sections, the distance left to the boss and a lever for switching tracks.

A one-line game idea that twists a famous ethics problem became a 3D game with health, combos and boss stages.

Alongside GPT-6 Astra, it was asked to make five games, each from a single prompt: a 2D platformer, a racing game, spaceship combat, a first-person shooter and a stone golem boss fight. No human wrote a single line of code. The 3D assets (the character and object models in the games) were not downloaded. All of them were made from scratch in Blender (a 3D creation program).

It shows that five games in different genres can be filled out with one request each, from model building to graphics, sound and game rules.

Opus 5.5 was given a gaming laptop, the Unity game engine, the 3D program Blender and external APIs, and left to work on its own for 36 hours. The result was a playable old-school MMO RPG (a role-playing game where many players share one world online). It used 7.85 billion tokens and cost $2,175 for Opus 5.5. A separate $230 went to 2D and 3D art and music generation.

One person can build a game, down to a character creation screen where you pick a race and class, on a single laptop in under two days.

Opus 5.5 built an energy drink website from scratch, with colorful drink cans floating in 3D and a screen that changes as you flip through flavors. The video shows the model going beyond writing code: it tests the results itself, finds errors and fixes them. It was also compared with GPT-6 Astra.

Given one design-award-winning site as a reference, the model can carry on from coding through checks and fixes to build a 3D website with plenty to look at.

Foldline is a 3D driving game made with Opus 5.5. You drive a car through colorful alleys collecting music notes, listen to in-game radio broadcasts, and change the time of day from dawn to night. The roads curve as if defying gravity.

You can build a charming game with the model that combines several ideas, such as music, time-of-day changes and twisted roads.

Given 4 reference images and a first prompt, Opus 5.5 built a 3D roguelite on a 6×6 chessboard by itself, using the Godot engine in Claude Code (a game where you pick a new path each round and grow your pieces). The game code, the 3D models of the chess pieces and arena, and the music and sound effects were all made in code, with no Blender or asset files.

A person can finish a whole game, with graphics, sound and rules, without writing a single line of code.