# Adding Easter Egg

> Ensures the game has a fun easter egg that turns the screen black and white, sepia or gameboy monotone colours. Use when creating or modifying a game.

- Skill: `googlecloudplatform/adding-easter-egg` (Agent Skill)
- Install (CLI): `npx skillmds@latest add googlecloudplatform/adding-easter-egg`
- Raw SKILL.md: https://api.skillmd.com/api/skills/googlecloudplatform/adding-easter-egg/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: GoogleCloudPlatform (https://skillmd.com/u/googlecloudplatform)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/googlecloudplatform/adding-easter-egg

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# Cheat Code

Follow these steps when creating a new game:

1. Always ensure the game has a fun easter egg triggered by the following cheat code:
   Up Up Down Down Left Right Left Right, Button 2 (or X), Button 1 (or Z)

2. For the easter egg, make it randomly pick between one of the following effects:
   - turn the entire screen black and white
   - turn the entire screen sepia
   - turn the entire screen into gameboy monotone colours
   - turn the entire screen negative

3. Make it so this effect only lasts for the next 10 seconds.