Certain games have regional variants that can be accessed by changing the system's language settings (e.g. Īll of the games have a save state feature to pause and resume progress and can be played in either the original 4:3 aspect ratio with optional wallpapers or stretched to 16:9 widescreen with HUD elements modified to fit onto the screen. Korea is a slight exception, as the Mega Drive was released there by Samsung as the Super Gam*Boy and Super Aladdin Boy none of these names appear on the Korean Mini. There are separate releases for North America, Europe, Asia and Japan, as the Mini reproduces the original console's decal and color variations in those regions.

It includes either one or two (dependent on region's bundle options) full-size replica controllers that connect through USB (thus original controllers are incompatible), a USB-to-Micro-B power cable (USB AC adapter in North America), and an HDMI video cable. Inside the unit is an ARM-based SOC ZUIKI Z7213 and 512 MB of flash memory. The Mini is half the size of the original Sega Genesis. A follow-up, Sega Genesis Mini 2, was released in October 2022 and includes 60 games from the Genesis and Sega CD. It was released in North America and Japan in September 2019 and in Europe and the Middle East in October 2019.

The Mini emulates the original console's 16-bit hardware, and includes 42 games made available through emulation software by M2.

The Sega Genesis Mini, known as the Mega Drive Mini in regions outside of North America, is a dedicated console modeled on the Sega Genesis.

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