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tech 15 August 2026

Unearthing a 31-Year-Old Easter Egg in Ecco the Dolphin

Ecco the Dolphin, a Sega classic, has been hiding a secret for 31 years. Dive into the mysteries of a recently discovered Easter egg that reveals a hidden cheat menu.

Article inspired by the original source
Unearthing a 31 year old Easter egg in Ecco the Dolphin ↗ 32bits.substack.com

A Dive into Gaming's Past

Over three decades ago, Sega released "Ecco the Dolphin" on the Sega Genesis, a game that became a cult classic for its stunning graphics and challenging gameplay. Yet, even the most dedicated fans hadn't uncovered all the secrets buried within its code. In 2023, a 31-year-old Easter egg was unearthed, reigniting interest in this timeless classic.

The Journey of the Game

Initially released in 1992, "Ecco the Dolphin" was ported to multiple platforms, including a 1993 PC version. Known for its ruthlessness, this version didn't offer the debug mode available on console, forcing players to navigate perilous underwater levels without a safety net. However, a peek under the hood reveals a hidden cheat menu in the PC version.

The Mysterious Code

Within the game's "About" dialog handler function, an intriguing piece of code was discovered. This code checks if the bottom-right corner of the dialog box is off-screen as it's closed. If certain keys are held, a LoadMenuA function is called for menu ID 0x70. In simple terms, this allows access to a cheat menu by pressing Shift+Ctrl and right-clicking on the main window.

How to Activate the Cheat Menu

Here's how you can activate this hidden menu:

  1. Open the Help > About EccoWin dialog.
  2. Hold down Shift+Ctrl+Left Mouse button, then double-right-click on the bottom-right corner of the dialog box.
  3. The OK button will change to kO. Keep holding Shift+Ctrl and dismiss the dialog box.

Once this sequence is performed, the cheat menu expands with additional options such as "Easy," "CD check," and "border."

Implications for Players

This Easter egg offers a new way to interact with "Ecco the Dolphin," making the game more accessible with options like removing the CD check and enhancing health management. While some options don't have a significant in-game effect, the discovery itself is a tribute to the complexity and depth of retro games.

Conclusion

The discovery of this Easter egg in "Ecco the Dolphin" highlights the importance of exploration and ingenuity in video game development. For developers and enthusiasts, it's an opportunity to revisit a classic with a fresh perspective.

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Ecco the Dolphin Easter egg Sega Cheat menu Retro gaming
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