Game Genie (Mega Drive)

From Sega Retro

  • Accessory
  • Program
GameGenieMD.jpg

Game Genie Screenshot (Genesis).png

Game Genie (Mega Drive)
Made for: Sega Mega Drive, Sega Game Gear
Manufacturer: Galoob
Release Date RRP Code

The Game Genie is a series of specialised "cheat cartridges" (or "video game enhancers") developed by Codemasters which allows the user to manipulate video games. Multiple Game Genies were created during the late 1980s and early 1990s, including cartridges for the Sega Mega Drive and Sega Game Gear.

Though developed by Codemasters, distribution was handled by Camerica in Canada and Galoob in the United States (and Europe, with the help of third-party distributors). Following the controversy of a Nintendo Entertainment System version of the device - of which Nintendo unsuccessfully tried to block, the Mega Drive and Game Gear enhancers were adopted by Sega as officially licensed products. The Game Genie brand has since been discontinued, however the idea lived on through Action Replay and GameShark hacking devices on newer consoles in the years which followed. Game Genie codes have since become a supported feature in most emulators.

Operation

The Game Genie attaches to the end of a cartridge and is then inserted into the cartridge port of the console for which it was designed.

Upon starting the console, the player may enter a series of characters referred to as a "code" or several such series that reference addresses in the ROM of the cartridge. Each code contains an integer value that is read by the system in place of the data actually present on the cartridge. The Game Genie cannot manipulate RAM, though it can make the console read different values from SRAM.

Because they patch the program code of a game, Game Genie codes are sometimes referred to as patch codes. These codes can have a variety of effects. The most popular codes give the player some form of invulnerability, infinite ammunition, level skipping, or other modifications that allow the player to be more powerful than intended by the developers. In rare cases, codes even unlock hidden game features that developers had scrapped and rendered unreachable in normal play (an example of this is the final Hidden Palace Zone in Sonic 2).

The Game Genie was usually sold with a small booklet of discovered codes for use with the system. However, these booklets would eventually become inadequate as new codes were discovered and new games were released that were not covered. To address this, an update system was implemented, where subscribers would receive quarterly booklet updates for a fee. In addition Galoob also ran ads in certain gaming publications (such as GamePro) that featured codes for newer games. Today, these codes and many others discovered by players can be found for free online.

Mega Drive

On the Sega Mega Drive, the Game Genie can function as a country converter and bypass the TMSS (TradeMark Security System) since most of these games are only "locked" to their respective regions by the shape of the cartridges and a set of a few bytes in the header of the ROM. In other cases Game Genie codes can be entered to allow a game to be played on any region console.

Game Gear

The Sega Game Gear's Game Genie has a more complicated design than those for other systems. When inserted into the cartridge slot, another slot will pop-up to insert the Game Gear cartridge. It also has a compartment which contained a book of codes.

The codes were printed on sticky labels to put on the back of the Game Gear cartridge. When entering codes, the player could easily see what to type in rather than looking through the book. Many of these codes can now be found online as well.

On the screen in which a code is entered for the Game Gear Game Genie, a player typing the word "DEAD" will cause the screen to move up and down, possibly as an Easter egg.

Scrapped Game Genies

New Game Genies called "Game Genie 2" were in the works in 1993 which would store codes and not require codes to be entered each time booting up the system. It was also going to have code searching features similar to the Pro Action Replay. This means it could probably alter RAM as searching for codes that affect ROM would have been more difficult. Due to some Game Genies recently being released it was decided to hold off the release of the new version till at least the following year but wound up being scrapped instead.

A scrapped Sega Mega-CD version of the Game Genie was also in the works and was designed to fit in between the Mega CD and Mega Drive and would intercept code as it passed in between the two. It was only known to work with the Mega Drive 2 and the Sega Mega-CD 2.[1]

Promotional Material

Physical Scans

Mega Drive Version

Mega Drive, US (older)

Game Genie (Genesis, Gold).jpg
Cart
Mega Drive, US (version 2)
GameGenie MD US Box Back Alt.jpgNospine.pngGame Genie US MD bluebox front.JPG
Cover
GameGenieMD.jpg
Cart
Mega Drive, US (version 3)
Game Genie US MD box back.jpgNospine-small.pngGame Genie US MD box front.jpg
Cover
GameGenieMD.jpg
Cart
Mega Drive, UK

GameGenie MD UK Cart.jpg
Cart
Mega Drive, UK (Extra Power)
GameGenieExtraPower MD EU Box Front.jpg
Cover
GameGenieExtraPower MD EU Cart.jpg
Cart
Mega Drive, FR

GameGenie MD FR Cart Back.jpgGameGenie MD FR Cart.jpg
Cart
Mega Drive, BR
GameGenie MD BR Box Back.jpgGameGenie MD BR Spine.jpgGameGenie MD BR Box Front.jpg
Cover
GameGenie MD BR Cart Back.jpgGameGenie MD BR Cart.jpg
Cart
Mega Drive, CA

GameGenie MD CA Cart.jpg
Cart

Game Gear Version

Game Gear, US
Game Genie US GG boxfront .jpg
Cover
GameGenieGG.jpg
Cart
Game Gear, UK
GameGenie GG UK Box Back.jpgNospine-small.pngGameGenie GG UK Box Front.jpg
Cover

External Links


Sega Mega Drive
Topics Technical specifications (Hardware comparison) | History | List of games | Magazine articles | Promotional material | Merchandise | Cartridges | TradeMark Security System
Hardware Japan | North America | Western Europe | Eastern Europe | South America | Asia | South Korea | Australasia | Africa
EZ Games | LaserActive | Mega Jet | Mega PC | Mega Play | Mega-Tech System | Nomad | Teradrive | Mega Drive Mini | Mega Drive Mini 2
New Mega Drive | Tianli VCD/DVD Players | "Consoles on a chip" | Licensed clones (Magic 2 | Mega Game II | Power Pegasus | Super Bitman)
Unlicensed clones
Add-ons Game Box | Power Base Converter | Mega-CD | 32X (Mega-CD 32X) | Mega Modem | Demo System DS-16
Cases Sega Genesis Nomad Carrying Case | System Carry Case
Controllers Control Pad | Six Button Control Pad | 6 Button Arcade Pad | Arcade Power Stick 6B | Konami Justifier | MK-1470
Action Chair | Activator | Arcade Power Stick | Keyboard | MegaFire | Mouse | Mega Stick | Menacer | Remote Arcade System | Ten Key Pad | Third Party Controllers
Accessories 4 Way Play | Cleaning System | Control Pad Extension Cord | Genesis Speakers | Headset | HeartBeat Catalyst | Microphone | Region converter cartridges | Mega Terminal | Nomad PowerBack | RF Unit (Mega Drive 2) | SCART Cable (Mega Drive 2) | Stereo Audio Video Cable | Team Player | Video Monitor Cable | Third Party Accessories
Network services Sega Channel | Sega Game Toshokan | Mega Anser | Mega Net | TeleBradesco Residência | XB∀ND
Development tools ERX 308P | ERX 318P | Sprobe | SNASM68K | SNASM2 (Mega Drive) | SNASM2 (32X) | PSY-Q Development System (Mega Drive) | PSY-Q Development System (32X) | 32X CartDev | Sega Mars Development Aid System | Sega 32X Development Target
Unreleased Edge 16 | Floppy Disk Drive | Mega Play 1010 | Sega VR | Teleplay System | Video Jukebox
Sega Game Gear
Topics Sega Game Gear | History | Magazine articles | Promotional material | Merchandise
Hardware Japan | North America | Western Europe | Eastern Europe | Asia | South America | Australasia | Africa
Wide Gear
Add-ons Pro Action Replay | Game Genie | X-Terminator | Master Gear Converter (Gear Master | Nuby Converter) | Stereo FM Tuner | TV Tuner
Cases Carry-All | Deluxe Carry-All Case | Gear Bag | Holster Case | Standard Carrying Case | Soft Case | Third Party (Play & Carry Case)
Accessories A/V Cable | Battery Pack | Car Adaptor | Car Antenna | Cleaning Gear | Gear-to-Gear Cable | PowerBack (Third Party) | Screen Magnifier (Wide Gear | Super Wide Gear | Third-Party)

Handy Gear | Master Link Cable


Sega Mega-CD
Topics Technical specifications | History | Magazine articles | Promotional material
Hardware Mega CD (Asia | North America | Western Europe | Eastern Europe | South America | Australasia | Africa)
Sega Multi-Mega (Asia | North America | Europe | South America | Australasia)
Wondermega | LaserActive | CSD-G1M
Misc. hardware CD BackUp RAM Cart | Mega-CD Karaoke | Pro CDX
Development tools SNASM Mega-CD | PsyQ Mega-CD SDK | PSY-Q CD Emulation System (Mega-CD)
Unreleased hardware Game Genie