Mega Drive vs Genesis
The Mega Drive and the Genesis are the same 16-bit Sega console under two names. Here is what changed between Japan and North America — and the real reason the American machine was renamed “Genesis”.
Updated:
| Mega Drive | Genesis | |
|---|---|---|
| Full name | Sega Mega Drive | Sega Genesis |
| Maker | Sega | Sega |
| Generation | 4th generation (16-bit) | 4th generation (16-bit) |
| Released | October 29, 1988 (Japan) | August 14, 1989 (North America) |
| Launch price | ¥21,000 | US$189 |
| CPU | Motorola 68000 @ 7.67 MHz | Motorola 68000 @ 7.67 MHz (same) |
| Sound | Yamaha YM2612 FM + Zilog Z80 | Yamaha YM2612 FM + Zilog Z80 (same) |
| Region | Japan, Europe, and most of the world | North America |
| Cartridges | Mega Drive shape (region-locked) | Genesis shape (region-locked) |
The same machine, two names
The Mega Drive and the Genesis are the same 16-bit hardware. Sega released it in Japan as the Mega Drive on October 29, 1988, and in North America as the Genesis on August 14, 1989.
Both are built around a Motorola 68000 processor running at 7.67 MHz, with a Yamaha YM2612 FM sound chip and a Zilog Z80 as a secondary controller. The machine is the same on either side of the ocean.
Why North America got the name “Genesis”
Sega could not simply reuse the Mega Drive name in the United States. A storage-device company, Mega Drive Systems Inc., already held the rights to that brand in the US.
Sega co-founder David Rosen also disliked the term and chose “Genesis” to signal a fresh start for the company in America. Everywhere else — Japan, Europe, and most of the world — kept the Mega Drive name.
Cartridges and region
The two machines run the same games, but Mega Drive and Genesis cartridges differ in shape and the consoles are region-locked, so cartridges do not swap freely between them. A converter or a simple hardware mod bridges the gap.
Frequently asked questions
- Why is the Mega Drive called the Genesis in North America?
- Sega could not use the “Mega Drive” name in the United States — a storage company, Mega Drive Systems Inc., held the trademark — and co-founder David Rosen preferred “Genesis” as a fresh start. The rest of the world kept the Mega Drive name.
- Are the Mega Drive and Genesis the same console?
- Yes — the same 16-bit hardware, built around a Motorola 68000 CPU and a Yamaha YM2612 FM sound chip. Sega released it as the Mega Drive in Japan in 1988 and as the Genesis in North America in 1989.
- Can a Mega Drive play Genesis games?
- The two run the same games, but the cartridge shapes differ and the consoles are region-locked, so cartridges do not swap without a converter or a hardware modification.
- How much did the Mega Drive and Genesis cost at launch?
- The Mega Drive launched in Japan at ¥21,000 in 1988. The Genesis launched in North America at US$189 in 1989.